Hi, my name's David, I'm a gunsmith in training, and I've become very interested in engraving. However, I must confess I know very little about it. I'm interested in acid etching, as this seems to have a relatively shallow learning curve compared to other methods. I have done a few experiments on my own, involving 1018 steel blocks, muriatic acid, and various resists and temperatures. However, I have not found a resist that the acid will not remove. If anyone has any advice on how best to get started with this sort of process, I would be grateful.