My basement wall panels have about 1/8" grooves running from top to bottom. I am looking for an easy solutions to cover these grooves so the panels will look flat. I've tried to patch these grooves with joint compounds but it is taking too long. I've also tried the primer but it would require 5-6 coats to fill these grooves. Are there any products out there that can be use to fill these groove and make the process go much faster?
TIA