How we gave our stock tank pool a makeover: Day 3 After we painted the exterior and sealed the inside seams with a silicone sealer (say that 5 times fast) we were ready to start the interior paint process. I will say the prep is absolutely crucial- you want to make sure you have a clean, smooth surface with no debris to get the best application. We decided to go with an epoxy specifically made for pool interiors to give the best quality and durability. Epoxy is significantly more expensive than