I have a 40/yo trailer that is leaking, (probably the foot of snow over the winter). Exterior is aluminum siding. The roof already looks like it was coated once with a rubberizer, (guessing over 10 years ago).What I am wondering is if I should use a primer before recoating or just apply directly?How clean does the it have to be, (not sure if it is just weathered or not getting the dirt completely off)?Should I apply a chemical cleaning agent on it? via /r/DIY http://ift.tt/2sUABPG
