Our MH is fairly clean all over (does need a wash after recent trip) but not the roof, after our recent trip and having trouble getting TV reception on the old Status 530 I went and bought a Status 570, easy enough to fit almost a straight swap barring screw holes, anyway back to the roof it seems UV and lack of cleaning is leaving the roof with a fairly textured finish (unless its supposed to be) I bought a very long handled car washing brush from Aldi the other day and intend on giving it a scrub but I don't feel I should try and scrape the remaining crud off for fear of damaging the (I assume) glass fibre, is there anything out there that we can kind of recoat the roof with with out it running all over, what do you do?