Hi Charlie,
What I do is mask off the area I am fixing the rubber to, paint the hull remove the masking then rough up the back of the rubber and the hull before sticking the rubber in place, I find it sticks best to unpainted surfaces. If you have already painted your hull mask off approximately 1/8th of an inch in from the edge of the rubber,rough up the paint then apply the adhesive, let it dry then remove the masking and stick in the rubber. Make sure you get it in the right place first time as it really does stick. Good luck.
Cheers, Pete