Rt wing lower skin, ribs, and spar scotchbrite and cortec.
Scotchbrited all contact points on lower inside skin, along the skin side of ribs, and skin contact area of front and rear spar.
I wiped down everything with acetone, vacuumed the wing out, and then used airbrush to Cortec it all.
I found a splash of coffee soda (?) on the inside wingtip, it looks to kinda have etched, couldn't clean off with Acetone, so i scotchbrited it, wiped with acetone, and Cortec'd it.