I read a couple threads on dry moly and bought some cheap dogtags to try out. Not having much luck. Last try was 100 speed, full power… three coats of moly with about 5 minutes or so between coats and about 20-30 minutes before I tried to etch. Got almost nothing. One small spot towards the end of the etch looks ok but that’s about it. Just a very very faint image in the rest of it. Could it be the cheap dogtags themselves? I notice now that I just assumed they were stainless, but it just says they are “metal”. 
Are they magnetic? Cuz if not, they’re probably aluminum - if so they could still be tin…
Some folks on here have had good luck spraying things with paint and then etching it off.
Unfortunately I don’t ahve a magnet handy… But that’s what I’m guessing. I’ll just order some stainless steel blanks like I should have to begin with. Tried to get off cheap and that’s what I get.
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Eh, try the spray paint thing - you might like having access to colours other than black!
So etch the paint off of the negative space, leaving the color where I would normally etch?
In retrospect probably a silly question… etch off what I want off regardless. 
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Go both ways 
Negative space would give you silver letters, positive would give you letters on silver 
Found an old knife and tried that. OBVIOUSLY the dogtags were aluminum or tin. This turned out muuuch better. 
Actually surprised it turned out as well as it did. I just guessed at the focal height. 
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Love it, my brother makes knives so I’ll have to try it on the one he made for me.
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