I'd paint the outside and leave the interior bare . Aluminum will start getting that milky look after exposure so unless you want to keep polishing it I'd paint or Line X itNow the question is whether or not to paint the lid. Skinned in aluminum.
Thanks. I appreciate the extra info. I'm just coming up to that stage with my lid. The additional pictures are also helpful.Struts are 100lbs. Raises unassisted in current location. Still easy to lower. The other hole locations make it harder to close which will be nice if I mount a tent.