Glowforge Pro Laser Cutter and Engraver: What I Learned About Metal Marking, Rubber Stamps, and Plasma Cutting

Start With What I Can't Tell You

I can't tell you whether to buy a Glowforge Pro. Not because I don't have an opinion, but because your situation is different from mine. What I can do is show you the exact questions I ask before recommending a laser cutter. That's what this article is: a decision guide based on mistakes I've made, not a marketing page.

I've run a small custom products shop for six years. I handle laser cutting and engraving orders for local businesses, Etsy sellers, and a few schools. I've personally made—and documented—14 significant mistakes, totaling roughly $11,000 in wasted budget. That's not a brag. It's a warning. Most of those mistakes came from not understanding the difference between a laser marking metal, a laser cutting rubber, and a plasma cutter cutting steel.

The Glowforge Pro is a CO₂ laser cutter and laser engraver. It's good at certain jobs and wrong for others. The question can it do everything I need has no yes/no answer. But it breaks down into three scenarios that cover about 90% of the questions I get. Let's walk through each one.

Scenario 1: You Want to Make Rubber Stamps from Laser Engravable Rubber

Laser engravable rubber is a material designed specifically for this. The laser beam cuts through it and removes the background, leaving a raised stamp surface. The Glowforge Pro handles this material very well. It's one of those rare jobs where the machine feels easy.

We've made a lot of custom stamps over the years—maybe 250? No, I'd have to check the system. It's somewhere around 220, give or take. We've made return address stamps for wedding invitations, logo stamps for soap makers, and a giant one for a furniture shop's packaging. The details come out crisp, and because the process is repeatable, the twenty-first stamp matches the first.

The important thing is to use actual laser engravable rubber. Not generic rubber sheet. I learned that difference in 2018 when I bought a rubber sheet for crafts and tried to laser-cut it. The result smelled terrible, produced sticky edges, and ruined a $30 piece of material. It was not the machine's fault. It was a material mistake.

What about the Glowforge Pro specifically? If your only product is rubber stamps, I wouldn't insist on the Pro. The higher wattage helps with thicker materials and faster cuts in hardwood, but stamps are thin. A less powerful machine can do them. The Pro becomes worth it when you need one machine for stamps, acrylic, wood, and light metal marking. That versatility is the reason most small businesses buy it.

There's also a hidden business side to this. The quality of the stamp is the quality of the client's brand. If you send a client a stamp with uneven edges, they'll press it onto their packaging and see—well, they'll see sloppy edges. When we moved from a budget laser to the Pro, the difference in edge sharpness was visible. One wedding stationery client said the logo looked like a real print shop did it. That's perception, and it matters. At least, that's been my experience with small-batch clients. Process quality gets remembered. (The machine that looks expensive sometimes pays for itself in feedback.)

If you want to sell custom stamps online, shipping is another bonus. According to USPS pricing effective January 2025, a 1-ounce First-Class Mail letter costs $0.73. A small stamp and a care card fit in a standard envelope, which keeps costs low and margins healthy.

Scenario 2: 'Engraving Machines for Metal'? Slow Down

This is the scenario where I made my most expensive mistake. In my first year (2017), I accepted an order for 50 stainless steel pet tags. I assumed that because the Glowforge Pro was advertised as a laser engraver, it could engrave bare stainless steel. Wrong.

From the outside, a laser engraver looks like it should engrave any material. The reality is that the laser wavelength decides which materials actually absorb the beam. CO₂ lasers, which is what the Glowforge Pro uses, have a wavelength that most bare metals reflect. The beam heats the metal but doesn't remove material cleanly. I held the test tag under the exhaust, ran the same settings I'd used for anodized aluminum, and watched the beam pass over the steel without doing much. I tried again (ugh). Then I adjusted the settings until I burned the surface. The result was a batch of tags with brown scorch marks and a faint, unreadable logo. Every single one was garbage.

That order cost me around $890. Actually, it was closer to $1,150 if you count the Cermark I bought afterward and the overnight shipping for replacement tags. I only believed the warnings after ignoring them and paying that bill. Classic.

So let's be specific about what the Glowforge Pro can and cannot do with metal:

• Cannot: cut stainless steel sheet, or create deep, recessed engravings in bare steel.
• Can: mark coated and anodized metals (like anodized aluminum signs, powder-coated bottles, painted metal tags).
• Can, with a marking compound: mark bare metal like stainless steel using Cermark or similar. The result is a dark surface mark—not a deep cut.

If you've been searching for engraving machines for metal, ask yourself whether you actually need to cut metal or mark it. Marking means changing the surface. Cutting means separating material. The Glowforge Pro is a marking tool for bare metal (with additives) and a cutting tool for non-metals. It is not a metal cutting laser. It will not replace an industrial fiber laser for sheet-metal work. Claiming otherwise gets people into the same trouble I was in.

Why does this matter? Because the word engraving gets used loosely. A deep-engraved stainless steel nameplate with visible, recessed letters requires a fiber laser or a mechanical engraver, not a CO₂ laser. If you promise that to a customer, you're going to deliver something different. That's not just a problem for your refund rate; it's also a truth-in-advertising issue. Per FTC guidelines (ftc.gov), product claims have to be truthful and substantiated. I'm not a lawyer, but I know that mislabeling a surface mark as an engraving is a good way to create a disappointed client and a careful product review.

On the other hand, if your metal job is surface marking, the Pro can be a useful tool. We use Cermark for small runs of brushed stainless steel tags. It works, but it adds an extra step and a consumable cost. At least, that's been my experience with 304 and 316 stainless. I haven't tested every alloy, and I definitely wouldn't promise same results on uncoated titanium or carbon steel without a test piece first. Always test a scrap piece. Always. (I learned that one the $1,150 way.)

Scenario 3: Can You Cut Stainless Steel with a Plasma Cutter? Yes. But...

I get this question more than you'd think. Usually it comes from someone who heard that a Glowforge Pro can't cut metal, so they wonder if a plasma cutter is the answer. Yes, a plasma cutter can cut stainless steel. That's what it's for. A plasma cutter uses an electric arc to turn gas into plasma, which melts through conductive metals, and a high-pressure jet blows the molten metal away. It cuts mild steel, stainless, aluminum, and copper. It's a fab shop tool, not an engraving tool.

Plasma cutting is great for structural work, brackets, thick plate, and general metal fabrication. It is not great for fine details. The cut edge has a heat-affected zone and often needs grinding. If you're trying to engrave a detailed design on a thin stainless steel sheet, a plasma cutter will produce a rough, wide kerf and a lot of cleanup. Use the right tool for the job.

What does this have to do with the Glowforge Pro? Nothing, except that people keep trying to make one tool do everything. The Glowforge Pro is a CO₂ laser cutter/engraver optimized for non-metal materials and certain coated metals. The plasma cutter is a heavy metal cutting system. They are not competitors. In our shop, we use a plasma cutter for steel frames, the Glowforge Pro for wooden boxes and acrylic panels, and a local shop's fiber laser for deep marking of stainless parts. Each machine has a lane.

So when someone asks me can you cut stainless steel with a plasma cutter? I say yes. Then I ask what they're actually trying to make. If the answer is precise engraved metal tags, plasma is wrong. If the answer is I need to cut 30 stainless steel plates into rough shapes, plasma is the right call. If the answer is I want a Glowforge Pro to do all of it, I ask them to read the rest of this article again.

How to Tell Which Scenario You're In

The problem with generic buying guides is they try to give one answer for everyone. Here's the decision guide I use now. It's not complicated, but it would have saved me thousands if I'd had it in 2017.

1. Name your primary material. If it's steel, aluminum, or any thick metal plate, a Glowforge Pro is not your cutting solution. If it's wood, acrylic, rubber, leather, glass, or coated metal, you're in the right place.
2. Name the operation. Are you cutting, marking, or engraving? Cutting means material is removed all the way through. Marking means the surface changes color or texture. Engraving means a visible recess is created. The Glowforge Pro cuts non-metals, marks certain metals, and engraves non-metals. It does not cut metal.
3. Name the client's expectation. If they need deep engraved stainless steel nameplates, that's a fiber laser. If they need custom stamps from laser engravable rubber, the Pro is enough. If they need 40 steel brackets, get a plasma cutter. Test whether your potential machine can meet the required tolerance and finish.

That last question is where I always failed. I assumed the tool was good enough without testing. Now I have a pre-quote checklist that our team uses for every project. It includes:

• Material type and thickness confirmed?
• Cut vs. mark vs. engrave confirmed?
• Does the material require a coating, marking compound, or assist gas?
• Is there a scrap piece for testing before full production?
• What does the customer's sample reference look like?

Using this checklist has caught 47 potential errors in the past 18 months. Actually, 46—I'm mixing it up with one I flagged twice. Either way, it's paid for itself many times over.

The Bottom Line Is Quality (Not Just Price)

I don't think you need the most expensive tool in every category. I proved that myself by using a budget laser for the first two years. It was fine for some jobs. But for customer-facing work—stamps, signs, tags, packaging, display pieces—the finish quality affected how clients saw our work. When one customer holds up two stamps, one from a budget machine and one from a Glowforge Pro, they don't know which machine made which. They just know one looks sharper.

That's what quality equals brand image means in practice. The output of your machine is not just a product; it's the impression you leave. The $50 you save by choosing a less suitable tool can become a $500 loss when a client doesn't come back. But the reverse is also true: spending on the right tool for the right job returns more than it costs.

Everything I'd read about equipment said buy the most powerful machine you can afford. My experience with 14 mistakes and one spreadsheet says otherwise. Matching the machine to the job matters more. If you're asking yourself should I buy a Glowforge Pro, I can't answer that. But I can tell you this: discover your material, define your process, and test everything before you scale up. The machine that matches your actual scenario is the best machine. Everything else is just marketing.