6 only wet/dry sandpaper under running water or - 3 tub of water when sanding polymer clay, as you not want to breathe in the clay dust.
I usually use floor finish (4) to give my pieces a gloss finish. I apply a coat while the piece is still very warm from the oven and then heat the clay with a handheld heat gun to dry it. I repeat adding another coat while the piece is still very warm from the heat gun to apply two or more additional coats. I allow the final coat to air-dry.
If you want your piece to shine like glass, the highest gloss finish I have found is a two-part high gloss resin coating (such as Enviro-Tex-lite) (5). It is very thick and will give the surface of your piece tremendous depth. One coat of resin is equivalent to several applications of other glazes. The drawbacks are that it has a strong odor, and, if its allowed to migrate over the sides of the clay, it forms drips that need to be cleaned away periodically throughout the drying time. If you want the ultimate glossy finish, though, the work is worth it.
Make sure whichever glaze you select is polymer-clay friendly. Some sprays and brush-on liquid glazes will have a chemical reaction to the clay. These finishes will never completely cure, and after several days your clay will become sticky. Always test a glaze, watching it for a few weeks if you can, before you use it on your work.
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