The standard EBAY craft foil is what is resold as Green TRF for more $$$.
Rather than nail polish, any imperfections are easily touched up by a
silver sharpie, black is less effective. Then use 220 or 320 grit
sandpaper to shine the copper after the etch is done and a thin wipe of
petroleum jelly to seal the copper and make it a bit tacky for
installation of SMT parts. Soldering vaporizes the pet. jelly. Optional
application of a silver coating
(
http://www.cool-amp.com/cool_amp.html?gclid=CMTl67m89tACFUkjgQodXzoOOg) for a professional look.
Also, as the developer of the Apache AL13P single pass mod for single or
double sided toner transfer AND foil transfer....I am pleased to report
that the Trulam320B laminator ($99 @ Amazon)is a rebadged AL13P from my
inspection.
I will be shortly verify this by adding the DIY mod to make it a dual
paper & PCB laminator. Then I'll post the images and guides on my Hacker
ApacheAL13P mod site for all.
Ancel