Depending on the depth of the scratch I would use 400-1800 grit, the 400 for only the really deep scratches, then follow with 600-800 and then 1200-1800.
I sand in same the direction as the scratch. For teeth marks I would sand in a circular motion and probably use 1200 first.
You might want to start with the fine 1200-1800 first to see the effect, but the finer paper requires more effort to see the results. Be sure to always progress from the course paper to fine. Sand as little as possible to prevent the area from looking distorted.
After using the fine 1200-1800 grit paper the arcrylic can be polished with a cloth and some of the arcylic polishing compound available at the stores. I think similar results could achieved using other polishing substances, like baking soda. If you didnt use too much it shouldnt changes the ph much.
From: "Susan Welenofsky" <welenofsky@comcast.net>Reply-To: Greater Seattle Aquarium Society member chat<gsas-member@thekrib.com>To: "GSAS Member Chat" <gsas-member@thekrib.com> Subject: [GSAS-Member] Safe in Tank Acrylic Sandpaper Date: Mon, 4 Apr 2005 10:50:26 -0700What is a good, safe, in tank sandpaper? I believe I have a lot of scratches on the acrylic surface from tooth marks from a pleco. I read something aboutmicromesh being safe. I was also wondering if the black wet/dry auto sandpaper was safe to use. I know they sell acrylic scratch kits that are safe to use in aquariums, with fish, but they are quite expensive. Susan _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member
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