Hi all, I found an old Yamaha G240 II at a junk shop and it looked like it needed a bit of a facelift. It has a nice solid spruce top but the varnish was really dark and scratched. I decided to sand it back to wood and french polish it. Getting the varnish next to the bridge was a problem and decided to use my glassfibre pencil which I use for cleaning electronic contacts. It worked really well. Here is a picture,
Hope this helps someone.