I use .080 styrene since the cabs are .0750 and I have never seen it. As for an adhesive I use Plastruct Bondene. For filler most here use evercoat.
Styrene can be purchased from me.
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Bondene can be purchased from most hobby supply shops.
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Evercoat body filler is sold at most NAPA auto part stores.
Click here
Here is a link to evercoats product page.
evercoat poly flex
Travis