Reddit reviews BENCH WIZARD 36 Pc Premium Number & Letter Set ¼" (6MM) - TZ9098
We found 4 Reddit comments about BENCH WIZARD 36 Pc Premium Number & Letter Set ¼" (6MM) - TZ9098. Here are the top ones, ranked by their Reddit score.
A well made, durable set of stamps | 36 pcs - A through Z | 0 through 9Compact size box, won't take up a lot of spacePerfect for personalizing jewelry and other itemsProfessional quality
http://www.amazon.com/gp/product/B005ESSZNC/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
https://www.amazon.com/BENCH-WIZARD-Number-Capital-Letter/dp/B005ESSZNC
Something like this is what I ended up looking at for serialization purposes (I'm going to heat them to press into a polymer lower, but if you're doing aluminum you can just do the hammer punch method they were made for). Gotta make sure the sizing is appropriate but I think they'll work well and aren't insanely expensive.
As for the handles: yes, epoxy every surface and every hole. I epoxy around the pins too, just to be sure everything gets coated. Keep some rubbing alcohol or acetone and paper towels or q tips around to wipe off excess and squeeze-out. This will save time spent scraping later! Don't clamp too tightly or all the epoxy will get squeezed out.
As for engraving, look up acid etching. I haven't done it myself, but I've seen others do it. Alternatively, I think something like this might work.
if you are paranoid, you can hammer it down on a stainless sheet for a very cheap fireproof stuff.
http://www.amazon.com/Professional-Letter-Number-Stamp-Punch/dp/B005ESSZNC/ref=sr_1_3?s=hi&ie=UTF8&qid=1419104395&sr=1-3&keywords=punch+number