1. R

    Gunsmithing Surface Hardening compound?

    I recently worked on the trigger on one of my AR-15s and had my 'smith harden the surfaces of the hammer and sear since I'm pretty sure I broke through the original hardening. He used a product from Brownell's that he bought 30 years ago and that he said is no longer made since California...
  2. S

    Gunsmithing Painting with deep surface pitting

    I blasted and finished painting with Aluma-Hyde 2. Everything went well but the receiver had some deep rust marks that I hoped would fill with a thick coat- they didn’t and really detract from the paint job. I decided to strip and start again but need some advice as to what “filler” to use...