Sorry to jump in....what you guys are talking about is called a "notched transom". As previously mentioned, it does help to get a cleaner stream...
Gonzo Are you sure of the 18% figure...never heard of or seen any figures that suggest fiberglass with polyester absorbs anywhere near 18% water....
Sorry I think... I may have not read your orginal post clearly. Are you trying to repair or patch a particular area of a boat, or are you having...
Did you glass that entire section... or just the rectangular area with the putty...? Any Bondo type of catalyzed body filler will work for...
Don't see the pics yet... guess there is a time delay. No matter...I'm also glassing my project boat and yes, the outside corners are always...
This may work for you... Here is an interesting product called speed rails that act very similar to reverse chines. I cannot personally vouch for...