Sanding is about done after the 1st coat is complete, going to finish it off with the 2nd / hot coat tonight, probably finish the sanding tomorrow. Not my best work, but it'll be water tight. Hopefully I can clean it up a bit more.
Not to hi-jack your thread, but heres a ding repair / restoration project from this past weekend. Pics go from newest to oldest (edit) ....stupid pics uploaded sideways
Cool boarts! You're not hi-jacking at all. This thread is for everybody to post about their surf boart repairs
thanks! It's all the same board. I fixed like 7 dings and sprayed her for one of my buddies. He hated the peptobismol pink so I went with a super masculine camo design
I read somewhere to add a little extra hardener on the hot coat to give it that shine. Seemed to do the trick.
never heard that before. I know with epoxy the ratios are super important. I wonder what LBCrew would say...
Neither had I till I read this... 11. Apply Another Coat After you have sanded the repair down flush with the shape of the surfboard, apply another coat of resin. This is sometimes referred to as a hot coat if you add a little more catalyst than you did the first time. Basically the resin will cure faster and it becomes hot as it does so. This isn't as strong of a coat but will let you put a nice looking finish on it. http://www.surfscience.com/topics/surfing-lifestyle/life-as-a-surfer/how-to-fix-a-surfboard-ding
BTW, I did the initial repair the proper 2:1 ratio, which I think is most important. The hot coat is more for looks than anything.
That's not a very well written explanation of a hot coat, and it only pertains to poly resin anyway. If you are using poly resin, yeah you use a bit higher catalyst ratio for the hoat coat. Not because it will be shinier, but because it will be sandable quicker, and you just don't want it sitting there runny any longer than needed. You also add surfacing agent to the resin to make it sand out better. If you are using epoxy resin, then the Surfscience quote is not applicable. You should use the 2:1 ratio for every step. Deviating from that 2:1 ratio by adding more hardener is not recommended, and provides no benefit. It actually could make the resin fail to cure properly. Also, the hot coat is not just for looks. Any repair that doesn't including that hot coat layer is susceptible to having water leak through the repair into the core of the board.
Gotcha. I didn't add too much extra, just a touch honestly. But it seemed to work, soooo, should be good right?
Yeah it was just the hot coat. It seems hard and sandable, I'll know soon enough once I attempt to finish.
Ya took the words right outta my mouth. As long as it kicked (fully hardened so you can sand) you're fine. After you have a batch that doesn't kick you become very diligent about you ratios. The epoxy I use is 1:.44 so I use a weight scale to make sure I'm right on the money with my mix.