Thanks for the advice y'all. So Here's what happened. I took the trim tab off, thankfully came off fairly easily but the gel coat did rip off at one spot. I performed a marine tex repair on that spot. Also, to remove the remaining (what I think is 4200) I used anti-bond from west marine. I complete rip-off but it works really well!!!! You can see in one of the pictures the adhesive is pealing off. I sanded off the rest of the 4200 until I had a nice smooth surface. Acetone worked really well to remove remaining adhesive and any bottom paint.
To remove the busted screw I used left hand drill bits I bought from grainger online. Started with a small size and worked my way up until the drill bit caught the screw and unscrewed it. (I did a few practice runs on my screws I drilled into a wood and sawed off the head). The left hand drill bits work amazing!!! I got the smaller size "mechanic length" bits with cobalt. Cuts through stainless steel like butter.
I learned the screws that come with the Lenco kit are actually 304/306 stainless. Not the best stainless, it should really be 316. So I purchased stainless 316 screws and hardware from boltdepot.com. I also added sacrificial zincs I bought from west marine.
If I stay on top of these zincs I should not have any more problems! Attached are some photos of the progress and then the final product.
