For the last few years I have been using Aerospace 303 Protectant on our trailers due to its UV blocking characteristics and protection for RV decals. We need it here in Texas.
So I thought I would pass along the following tips to help those who might try it.
The biggest problem for me has always been its tendency to streak if put on too heavy. So I always put in on in very light coats, which is also recommended by the manufacturer. If a streak does occur, I carry a lightly water moistened hand towel and rub the streaks out after I wipe it off. Eventually you will have a very slick, uniform appearance.
Next, I like to use 303 when the humidity is high. I have tried using it in arid, low humidity climates and it dries too quickly. More humidity give you more working time to work out the streaks.
Finally, I usually put on at least two light coats on our entire trailer. You will notice a marked improvement in appearance with the second or third light coat.
To add to Mikes good thoughts, this is what I use to spread it out on the rubber roof.
It is one of those car mops. I use a good solid step ladder from the side, squirt it out on the roof and then spread it around with the car mop. ( I have a non walk on roof) After use wash the mop head out hang it up to dry and ready to go the next time. Works good.
303 is great for extending the life of your camper.
John & Cindy
2005 Ford F350 Super Duty, 4x4; 6.8L V10 with 4.10
CC, SB, Lariat & FX4 package
21,000 GCWR, 11,000 GVWR
Ford Tow Command
1,700# Reese HP hitch & HP Dual Cam
2 1/2" Towbeast Receiver
2004 Sunline Solaris T310SR
(I wish we were camping!)