Prepare Interior Surfaces and Address Imperfections

What happens here

Inside the observatory, begin by masking the floor perimeter to protect it from the block filler. While applying the block filler using an inner-feed roller, pay close attention to any lint or debris that may transfer from the roller to the wall. Immediately pick off any visible lint from the wall using a utility knife or similar tool and wipe the roller clean with a damp sponge. This ensures a smooth, clean finish, preventing the need for sanding once the filler dries. The presenter emphasizes the importance of 'delinting' rollers before starting to prevent this issue.

Goal: Mask off the floor inside the observatory and prepare interior walls for block filler application, proactively removing lint and other imperfections from the roller and walls.