Cowlings of the same period required a hell of a lot of preparation before painting, at most they were a scaffold to build fill onto. Gel coat is heavy no doubt but by the time they were bogged up enough to paint, I wonder how much weight advantage remained.
On the build wiring strobes to controller, fit 3A circuit breakers to Radio and C/S prop, fit rego decals, fit battery and add fuel. I have done my Weight and Balance course so will drain to unusable fuel, Weigh and get L4 inspection done and then it will be just paperwork.
I am badly non-current on my licence so will have to do some refreshment with an instructor and get my BFR done too.