We have a solid-core wooden front-door and would like to repaint it as our dog has scratched it many times (ahh the joys of pet ownership). We've sanded down the rough spots on the door but we noticed some hair-line cracks in the groove between the panel and the mullion.
The cracks aren't large enough to affect the structural integrity of the door but we're thinking that we'll need to seal it before proceeding with applying the paint. We can't sand it because the crack is in an awkward location on the mullion.
What can we use to seal small cracks? Caulk? Wood Epoxy?