I use Duragloss 901. It cleans very well and rinses clean. As for the rest of the RV I have tried many things over the years and have found Duragloss sealants to be the best. Last year I did a buffing routine with an orbital and wool pad using 652 to help clean up oxidation and years of yellowing using carnuba products. Did 2 coats of 601/105 which was on there for 14 months when I decided to recoat before the dreaded oxidation set in again. This time I did 601/501 first then 601/105 on top of that. The 601/501 removed any minor oxidation and cleaned the fiberglass for the final 601/105. The 601 makes the sealant set up like epoxy which then helps with the longevity. During the year the RV will get maintenance washes with 901 and dried using Aqua Wax or rinseless washes with 931.
Dave