Sanding blocks are 1/8" neoprene foam (mousepad) glued over 1x2 & 1x3 scrap pine, with 1/4" roundovers ( makes 3/8" roundover with padding. ) Use waterproof contact cement. The large block is sized for 1/4 of a standard sheet of sandpaper, and will also take half of a 1/3 sheet piece. Small block works well for details, inside horns, etc. The neoprene grips the sandpaper exceedingly well, wet or dry, and has just the right amount of 'give' for very fine sanding.
Sanding is one of the most important aspects of woodwork, and luthiery. In general, if there is a choice of method between sanding and something else, routing for example, sanding is much safer and preferable.
More: Sanding, Scraping & Filing ...
On the left is my excellent Preval vFan airbrush that Home Depot gave me to evaluate. You can see the hose has a standard 1/4" male QD connector installed. On the right is a pressure regulator, with a standard female QD connector on the outlet side, and a scuba-to-NPT adapter on the inlet side. Plug that into an inflator hose on a scuba regulator, and set your output pressure on the inline regulator.
More: Airbrushing "Off the Grid" ...
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