I would coat the entire hull with epoxy first, to seal all that porous gelcoat.
Capt. Larry Teuton
Cracker Built Custom Boats
“Ships are the nearest things to dreams that hands have ever made.” -Robert N. Rose
Thank you again Larry, your advice is much appreciated!
Hobie Outback
WS Ride 135
‘66 13’ Boston Whaler w/ Merc 25
15’ Henry O w/Johnson 50