Welcome to FiberglassRV Andre! There are better experts than I on the forums regarding
fiberglass repair. The forums are pretty quiet because of the holiday's but someone will probably pop in an answer your questions fairly soon.
However, (sounds better than BUT), this is a forum for trailers, not motorhomes. While we have members that have owned motorhomes, you may have more luck getting answers to "motorhome" problems on a forum like
RV Net. Certainly not trying to chase you away, we're a friendly group...just trying to get you to a place that may be better to answer your questions than us....
However (there's that BUT again), you're welcome to hang out and we'll help where we can