The caulking around the roof items on my 2001 living quarters trailer are looking quite cracked and aged.  I would like to replace. (The roof is alunimum) I've read the posts and found that this could be a 6 hr job which could result in hefty labor cost.  So, I'm looking at doing it myself.  After some research, I'm leaning toward using the Eternabond 4" Tape.  The job would entail using a puddy knife to scrape the old caulk off, a fine sanding pad, and use acetone to clean the area for a good adheasive.

Since I'm green at this, I'd like to know if I'm on the right track or is there something else I should be using?  Would the 2" tape work just as well?

Your wisdom is greatly appreciated.  I don't want to damage my trailer.