Hi there, just inherited this AB RIB, was stored outside and looks like moisture has got between the two layers. It still holds air. The worst of the bubbles are on the stern part of the tubes (it was stored upright on these). I contacted AB and they suggested patching. Looks like it'll be an awkward one to patch. What about sanding down and painting. Or should I not waste my time and move on? Much appreciated your input.