What about using clear krylon spray ? it applies like paint but puts a clear plastic coating on whatever you spray it.
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
Sent: Wednesday, August 09, 2017 4:57 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] White TRF Clearcoat
I am about to order White toner reactive foil to use as silkscreen (component outline). I was thinking about clearcoating the white-outlined component outlines (or black, depending on the fiberglass
color) with clear nail polish. Has anybody tried this already?