Those "blemishes" are specifically called Thermal Checking. It is a defect of the fiberglass gel-coat. Thousands of RV and RV suppliers were affected over many years.
Monaco went bankrupt because of it.
Take a look at my entry door (photo #1). That's what I have to look at each time I enter the coach. All of the storage bay doors are not affected because they are aluminum not fiberglass. The other three photos are of the sides of the coach.
To fix it, ALL of the fiberglass has to be removed down to the frame. All new fiberglass has to be applied and then painted, a $50 - $60 dollar project ain't gonna happen.
I use a special wax called Black Velvet which hides the Thermal Checking temporarily.
Dr4Film ----- Richard
2002 Monaco Windsor PBT 40Ft. (R HOME) - 30Ft. 2006 Pace Trailer (R JUNK). Trailer Has 06 VUE (R TOWD) 04 Victory Alen Ness Edition (R RYDE). Full-Timer for 14 Yr's BUT now a Part-Timer. Cummins ISC-350 With Banks Power Pack and Upgraded PRXB PacBrake.
Winter Home in Flagler Beach FL - Now Staying in Dansville NY for the Summer.