Re the plastic shield strip. I have a Pearson 31-2 and had some rub rail damage from Sandy. The aluminum rub rail made it but the plastic strip under the aluminum rail that screws to the under side of the hull deck joint did not. I did find something that I think is very workable though for a replacement. It is plastic wire mold by a company called Legrand. sold at home depot. here is the link
(Power-Rated Raceway, 400, 800, 2300 | by Legrand
I am in the process of using 4200 to join the flat piece to the side which had to be cut down.
I will try for some photos as I get to it. Pretty darn close though!