I have a tuflite (yes i know i'm a douche for buying one) from when i wasn't as "educated" a consumer of surfboards, and some of the outer shell is chipped or scraped off. do i need to reseal this, or is it still watertight? i've tried putting an epoxy hotcoat over the little spots just in case, but it's impossible to sand because it screws up the color all around the repair (it's that light brown color). the epoxy also usually won't stay on, and gets "peeled" of when sanding with a lower grit. is this because it won't adhere to the paint shell, or because i'm not mixing the resin correctly? when it comes off it feels all soft and bendy. also if anyone knows a solution to the paint problem that would be huge help since it's going to be impossible to sell with marks all over it.