Made some more progress in the last several weeks.

In the last photo, I had the entire frame sheeted. I've done a lot since then. I trued the plug with t-bar sanders loaded with 80 grit and a lot of bondo. I kept sanding until guide coats indicated no more low spots, etc. I used about 2/3 gallon of bondo and 15 sheets of sandpaper in that process.

I then glassed the plug with 8oz plain weave glass. Epoxy was post cured at 150F for 4 hours. Weave was filled with Evercoat Easy sand (polyester filler) and wet sanded with 120 grit until my guide coats indicated everything was true.

There were a lot of fiddly bits in the above process, everything from symmetrical verification to getting hard 90 degree corners where required. Lots of apply more filler, sand and repeat about a zillion times.

I primed 4 coats with PPG Omni 282 high build urethane primer. This was wet sanded with 180 grit on t-bars until the guide coat was gone.

For the final finish, I shot 6 coats of PPG Deltron 3057 over reduced for better laydown, and 10 coats on outside corners. Then I wet sanded starting at 320, then 400, 600, 1000 and 1500 grit. Then buffed with polishing compound.

Still have a few minor issues to attend too before I can wax, such as rudder exit guides and I want to mark reference dimples for wing tubes, adjustors, etc., but basically the plug is 99% done.