When wet sanding keep several pieces of various grits in a pale of soapy water. When a piece becomes loaded throw it back in the bucket. Grab a new piece and keep going.
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Sanding is a process that requires FRICTION between two surfaces, which results in the creation of heat. Epoxy Resin will soften when subjected to heat. Dry sanding creates LOTS of HEAT, which results in the sandpaper becoming clogged-up.
WET sanding greatly reduces the amount of FRICTION & HEAT generated during the process. It requires much more time & patience to achieve satisfactory results, & should be done in steps.
Start by using 600 grit WET sandpaper, & use a finer grade for each subsequent step (i.e., 800, 1000, 1500, 2000), using LOTS of water. If too little water is used, the paper can still become clogged (rendering it useless), which also results in ruining the smooth, shiny, finished look. Besides, high quality wet/dry sandpaper is not inexpensive. Stay away from the cheap crap sold by places like Harbor Freight.
A properly sprayed finish produces the best results, but if one doesn't have the means to accomplish that, wet sanding can produce a decent looking appearance.
Here are a couple of pics showing the results of wet sanding down to 2,000 grit, when used on epoxy (3:1 mixing ratio) laminating/finishing resin, that was applied using a brush.Comment
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