Hot coat issues

Hello everyone,

Third ask for help I’ve made now, hopefully the last! This is my first time making a board so having a few problems and not sure whether the issues have specific names or not so finding it difficult to search the forum. I’m making a board out of cardboard and I’ve used polyester resin. I’ve just done the hot coat top and bottom but have some funny dimples. In the photo below I’ve sanded the deck roughly but I wanted to find out how to solve the issue of the dimples? Do I fill them in with more resin plus wax in styrene? Cheers

SWAYBOX.com is the cardboard surfboard builders site or http://www.sheldrake.net/surfboards/