If I remeber correct paint works so laquer I would geus is fine, paint right
I think anything that does not conduct well or is a none metal actaully works for masking, like duct tape, masking tape, electrical tape, etc..
I think I used all 3 above tapes and other similar stuff for stencils when I brush plated stuff, but that was long ago since I did any plating like that. Try them on some junk scrap first, they should work.