Thanks for all the input. Am planning to soap and soak the bilge a bit, then light sand, then wash out and dry. I was planning to use rubbing...
I thought about that -- I'd have to degrease the bilge (it's fiberglass) and use a stick to sand lightly to give it something to stick to. There...
How strong an adhesive is 3m 5200? Is 3m 5200 strong enough to mount a rule bilge pump to the hull without using screws? My fiberlgass boat...