RE: Patching ABS Hulls
Have you considered "MarineTex"?
[link=http://www.marinetex.com/PRODUCT%20PAGE_files/All%20PolyDura%20Info/PolyDura%20General%20Info.htm]http://www.marinetex.com/PRODUCT%20PAGE_files/All%20PolyDura%20Info/PolyDura%20General%20Info.htm[/link]