Absent-Minded Professor, The (1961) -- (Movie Clip) I Dub Thee Flubber! 1  A discouraged Professor Brainard (Fred MacMurray) suddenly discovers he's invented flying rubber, thus flubber, in Walt Disney's The Absent-Minded Professor, 1961. > Play Now Absent-Minded Professor, The (1961) -- (Movie...
Step 3: Sand with 500-Grit. Attach a strip of 500-grit wet sandpaper to a hand-sanding block. Hard rubber sanding blocks work best. Dip the block into the soap and water solution. Sand the wood lightly with a circular motion. Continue dipping the block into the water to keep the surface of the wood wet.
After drying, sand first coat lightly with 220 paper on a sanding block. Wipe off polyurethane dust with a soft cloth, then wipe with a tack cloth, and begin applying second coat. I do not use sandpaper on the second coat. I use medium steel wool on the second coat, and fine steel wool on the third coat.