Mr. Surfacer is a great product for filling seams, especially in hard-to-reach places. Simply apply Mr. Surfacer with a small brush or toothpick. Wait a bit, then gently rub the area with cotton swabs dipped in 91 percent isopropyl alcohol. The alcohol will dissolve the top layer of Mr. Surfacer. Then, you can simply wipe it away. If the filler has been dry a while, be patient; the alcohol may take a few moments to dissolve it. On especially tough seams, I usually need to apply it a couple of times.

Tip submitted by:
Scott EspinReno, Nevada