I've done 25-30 of them from at least three different companies. Chinese to US made. All engrave about the same, you DO need to have surface level. If I'm out of focus on a section, it will usually darken. Too much power probably. Two passes cleans best. But Be Very Careful cleaning these. They use PAINT, not Powder coating like cups. You WILL scratch and remove adjacent paint with anything other than soft wipe with magic eraser. I usually hit with Simple green and lightly wipe off, then rinse and dry. Don't use DNA, it will cut paint.