55-57 Chevy Panel (resin)
These resin body’s are not easy to work with, a lot of the time the casting is so thick its hard to get the glass to fit and look right.
I bought this one cheap on ebay to use a fill in the yard. I used masking tape to make the patch across the bottom of the door, then weathered over it. The same paint trick as usual, flattening agent mixed with automotive basecoat.