I draw the letters on the piece by coating it with chinese white which is a white water color. Then I draw the letters with a sharp pencil. It is clamped in a vice so I can go over the pencil lines with a graver. This gives me a very precise line to follow with my saw blade and it can’t be smudged or torn like paper. I prefer the liquid lube because it is less messy and I use very little of it. I get a tiny bit on my thumb and pointer finger and rub it on the blade. Tap con for aluminum is available at hardware stores
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