Re: keel guard
Absolutely- in fact, many, many ugly transgressions on keels have been covered up by keel guards. I don't know of many boats that don't have at least some scratcing on the keels if the boats are used at all. The beauty of the guards is that they are very durable, resilient and protective. Just make certain you follow the directions to the letter as the surface must be perfectly clean for best adhesion. Also, read the directions as to how to attach the thing because if you touch the boat with the adhesive, they are VERY aggressive and may not be able to be removed without damaging the piece.
I've had a keel guard on my last 3 boats and I'll never have a boat without one. Well worth the money IMHO.
UFM82