I spray a lot of nitrocellulose and Target EM water-based paint. Shellac is also made from flakes. These filters work great with both surfaces. Others here said there was an issue with the blue mesh coming off the cone, poor quality glue, or generally unacceptable quality. This was definitely not the case with the batch I just bought and tried. (190) micron FINE filter. My guess is that they may have (7/2020) changed the glue they use to assemble them. highlighted.
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