I am wondering the best way to clean the top exterior of my camper.  The
white pop top is very dirty and there is moss growing between the top and
the seals I also want to remove.  It is water tight now and I hope that
cleaning the moss out won't make it start to leak.  Also, can I or should I
paint the pop top to preserve it, and if so, with what type of paint or
sealer?

I appreciate any feedback.

Aimee