how do you know what type of board you have? Epoxy or Polyes

[StormRiderHB]

Hi,

I have ding on my board and need to fix it. I want to get resin, how do you know what type of board you have? Epoxy or Polyester?

[drowningbitbybit]

Does it have a wooden stringer down the middle? If so, it's a poly; if not, it's an epoxy.
(That rule is not 100% true, but almost certainly so on boards that beginners will be riding).

What make is it? And post a picture, and we'll probably be able to tell you for sure.