A 79er should have the cardboard stringers sans foam core. Pop the decks and check the deterioration in the cardboard.
If damage warrants, grind out the stringers and hull flanges, then replace with carbon. Stiffen the hull shape. While you are in there check the bridle bedding for the bowtangs & maybe reinforce with carbon.
Beam mounts and straps - look for delamination there (threads as well) closely and replace internal plate if required. Re - bed the beams for more stiffness.
Just as black is threatened by UV damage, our eyes are threatened by it as well. Keep as much of the boat gray as possible - balance the spectrum.
Make sure your jib lead adjusting wires are rigged under the trampoline...ah y'all got me talkin' 5.2 stuff again. You should have seen Jim Leonard's 5.2 with the polished rudder housings and all. Even the beam end caps were polished shiny chrome. Maybe he won the Nationals one year because he blinded the other ninety boats.
Discovery, Sail# 98