Originally Posted by Alangaq
Wipe off with a rag moistened with toluliene (incorrect spelling I am sure) and then apply your two part hypolon contact cement to both the patch and boat. When just dry to touch, apply patch to boat.
Toluene is the correct spelling; note that a) Toluene is pretty nasty stuff - be careful with it if you use it; b) Toluene can be hard to find (at least here in the US; don't know about Canada), so MEK makes a good substitute (also note that while MEK is better than Toluene healthwise, it isn't by much, so the same warnings apply.)
Rather than a single layer of glue, follow the adhesive manufacturer's directions (usually 2 or 3 coats with drying time between; last coat allowed to just tack off before assembling parts. Follow with as much pressure as you can get on the join in order to bond the two adhesive treated parts together.)
I agree with the no power sanding part, unless you have a huge repair area, in which case use a not-very-aggressive cutting medium, and go really slow...