: An abrasive pad (like Scotch-Brite) will usually scratch up the surface
: enough for another coat of epoxy or varnish. It will get the low spots
: between the weave, but it isn't aggressive enough to sand into the glass.

I don't see the point in varnishing inside. Varnish is there to protect against UV and by the time one has installed seat, backrest etc. Especially if it is a Redfish style seat, you are more or less covered. A cockpit cover will protect if stored in sun and spraydeck does the same in use. Varnish is only going to add weight on the inside.

Et