Nice!
Gotta pix of the box? I've never seen a Testors S4 though I do have a couple S kits and a Fujimi S4. I think my S kits have opening doors too...
Oh, and as the black is not clear coated you may be able to just sand out the scratches and them mask and repaint the panel affected. I would try that before starting over on a paint job otherwise that nice.