I have spent some time next to Alpha owners over the last couple of years. One owner had "pitting" on the sides. Alpha's have a fiberglass structure and in this case the polyester resin used contained too much MEK causing a fast "cure" which caused the pox. It is fixable, however delamination is extremely expensive and certainly not cost effective. This is one where extreme due diligence should be used IMHO!
Clay & Pebble
2012 Providence 42 M. Spartan Chassis, 450 ISL
Ford Edge toad, RM All Terrane, TST TPMS, SMI Air Force One, RVM95....