I use multiple things truthfully...I mostly heat up the foam so it looks smooth and with a small shine to it. Then I plastidip spray it. And then I primer it with a few coats, then paint it with automotive paint, probably about 2-3 coats. Then I take 3 cans of CLEAR GLAZE OR GLOSS....and clear coat the whole suit until its all gone. Comes out perfect!! The pieces stay together with hot glue of course.And I cut one side of the chest and velcro to fasten it back together. Same goes for the abs. Mark 42 is insane!!! If you don't have any exp in building I would not recommend starting it with this suit!! And thanks so much!!