Re: Another Starcraft Restoration : SuperSport 18' 1977
Tagggg, where are you located? that boat looks like it's seen some heavy salt exposure. My mariner was in about the same shape. Check out my mariner link at tha bottom of my sig.
I'd bet most of that corrosion is from water getting in topside (on the inside at least). Like E says, we've seen worse.
Wire wheel the heck out of the inside. Do your water test and mark the rivets that leak. Buck the rivets with two baby sledge hammers, you on the inside swingin and one of your buddies that you know something on

under the boat holding the hammer on the rivit. Watertest again and buck again if needed. Drill out and replace broken rivets with small smooth head phillips head thru bolt with washers and lock nuts on the inside. Make sure you squirt some 5200 in the hole first. Then grind off the excess bolt on the inside, and cover the entire bottom of the boat on the inside with a good coat of gluvit.
Flip the boat, wire wheel the outside, wash with vinegar and water and wait for it to dry. Get yourself a small batch of marine tex. Mix it up and just skim coat the pitting areas but you gotta move fast! Wipe with a damp cloth before it sets up so you don't have to do so much sanding.
prime and paint!!!!!! No worries!