Estes USS Enterprise #1275, Part 42, Painting The Details

The raised, thick cardstock rectangles should have been painted the darker gray and then glued on the model. 

These aren't difficult to mask now, it's just some extra work that could have been avoided if I'd planned ahead!

The rectangles were outlined with Sharpie inked Scotch tape.

Brown tape widened the mask,

Plastic grocery bags covered the rest of the model.

With the masks removed there is very little touchup needed.