What if the ABS part was painted with Durocoat, would that block out the UV affects?
“What if the ABS part was painted with Durocoat, would that block out the UV affects?”
It probably would. There are UV stabilizers that can be added to plastic compounds.
I just think there are better plastics than ABS, and firearms’ plastics are specially engineered, not generic general purpose plastics like ABS and acetal copolymer.