The leading edges of both plastic fin cans had some rough edges.
This is the before shot. The upper right corner looks almost rounded off.
And after squaring up with 400 grit.
Most all the flat surfaces were fine, only one fin needed some molding "dots" sanding off.
Behind every fin was a molding line that needed to be taken off.
This one was the largest.
A simple sanding with a block took it down to surface.
Be sure to check the fin unit after the first color coats to see if the sanding scratches show through the paint.
The rear of the fin can squared up with 220 and then 400 grit.
This back end of the fin can was uneven and rounded on one side.
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