I had the same problem. Gelcoat. Using my motorhome as often as I did...other than washing the exterior....I let it go. So.....unable to "reclaim" anything that looked decent, I had the lower 1/3 (the blue/silver) repainted.
Sanded, all the doors and lights removed, (including the grill) painted and put back together with new ss hardware....$4000.00
The upper 2/3rds...(white with decals) did not have to get repainted. Compounding, polish and wax brought that up to almost new.
I had the job done at a local truck/car/RV repair shop that has a first class paint shop as part of their complex.
