After finishing the cabin cover, I cleaned and epoxied some of the larger holes in the interior of the cabin doors with quick set epoxy smoothing compound. Once cured and sanded, I wiped it all down with paint prep and coated it with poly filler. Once it dried, it was sanded and covered again. After sanding this time, I wiped it with down with paint prep and coated the edges that will be seen after the interior is done. It too was sanded after it dried. The doors are now ready to prime.