I have an older home with dark wood paneling in our large family room and all down the hall way. It has thumb width groves in the paneling that is rough to the touch. What would be a great way to fill in the paneling. Especially around an outside door, we do live in south mississippi but it still can freeze a few times a year and the door is a sliding glass door. So I want something I can use that won't crack in time??!