i'm starting to see little brown spots under the glass on my 2 y/o Jimmy Keith Whiskey Fish epoxy board...on the bottom, if that matters. anyone know what might cause that? will post pix if needed.
Results 1 to 10 of 11
Thread: Surfboard Melanoma?
Oct 17, 2012, 01:38 PM #1
Oct 17, 2012, 02:49 PM #2
water could have seeped in
Oct 18, 2012, 12:31 AM #3
ok, here's the visual...i don't see how this could be water because the spots are independent from each other. there are more than a few up and down the underside of the board. thoughts?
Oct 18, 2012, 01:11 AM #4
Is it a sanded finish? Could be that some glass fibers were exposed a
after it was sanded and are wicking water
Oct 18, 2012, 03:01 AM #5
i suppose it's possible, although it's nothing i can see or feel. there's are spots up and down the bottom side, random pattern of which the pic is typical. had the board for about a year and a half and it's pretty all i use, it's such a great all around board for this area (SE NC). i'm just wondering how bad it's going to get - may have to go back to see the guy who made it and see what he thinks.
Oct 18, 2012, 03:13 AM #6Senior Member
- Join Date
- Aug 2012
Could it be staining from something you store it on if it was both sides I'd be concerned about seeping. But only on one side could be something as simple as a reaction to what you lean it against. Hope this could help!
Oct 18, 2012, 03:24 AM #7Member
- Join Date
- Dec 2010
- Salisbury, Maryland, United States
Whats the core? eps? inconsistent mixes(highly unlikely in this case), irregular foam formulations, mold,pin sized holes allowing water entry, moisture that was already present in blank(not very likely but possible)alot of possibilities here. The span of time that you stated points in the direction of a water issue. Keep an eye out for the spots getting bigger and possible delamination at worst. Crazy things happen in surfboard building. doesnt mean its not a great board made by a great builder. Im sure if you take it back and let the guy have a look, he will do his best to get you answers and make you happy.
Oct 18, 2012, 04:58 AM #8Member
- Join Date
- Oct 2012
- Virginia Beach
Residual pentane, water or contamination. Pentane is the blowing agent in EPS (expandable polystyrene). It's a little more flamable than lighter fluid. EPS is pre-expanded, aged and then molded with steam and pressure. The process leaves residual pentane and water. My guess is a little water was left in the part (blank) and is now discolored. It could be contamination from the mold, in the EPS raw material or mold release.
Oct 18, 2012, 12:03 PM #9
Are the dot's pinkish instead of brown? I've seen pink imperfections appear when acetone is used with epoxy, and when spackle is thinned with hard water out of the tap... from minerals in the water... kind of like a rusting effect. That would be my guess, as EPS is usually spackled, then lightly sanded, removing the surface film of spackle, but leaving the little bead divits filled. Just make sure they're not pinholes. Otherwise, it's just cosmetic.
Last edited by LBCrew; Oct 18, 2012 at 12:05 PM.
Oct 18, 2012, 01:10 PM #10
the spots are rust colored - i'll break out a magnifying glass and see if i can spot any imperfections in the affected area (like pinholes). i can live with cosmetic problems, just don't want to see the board rot away from within.
thanks for the input!