I'm not sure which of these kinds of projects this is, but I thought that putting more wood into the car would be fun. I also thought that I'd see if i could use stuff I happen to have laying around (ie, make it a CHEAP project).
so, here we go. Something fun, but certainly not super fancy or showcar worthy:
Step one:
Take off interior door panel.
Step two:
Find some good grade plywood, this is 1/4" A-C, A is the best grade you can get, but it is NOT veneer plywood. i repeat IT IS NOT the same as a veneer plywood, or something that has a beautiful top layer that has the grain of wood in all its glory. This is just a nice piece of wood that can be sanded and has little in the way of imperfections.
Step three:
Trace door panel on the wood.


Step four:
Cut it out with a jig saw or whatever you want.
Step five:
Sand it with about 150 sandpaper. get edges as nice as you can. bevel the edge just a little so there isn't a sharp 90 degree edge.
Step six:
Apply a pre-stain wood conditioner.
Step seven:
stain whatever color you want. I picked something I had lying around that was pretty close in color to the dash inserts. It won't be the same, because this is very soft pine with no grain, but unless it's wayyy to black, or yellow, or orange it should be pretty close.

that's about where I am now. I was going to use Tung oil, because it's what I use around the house, but it just sucked up way too much, and this was supposed to be a budget mod anyway, Tung Oil ain't cheap. I did have some polyurethane, so I got that out and put a coat on. Much nicer, probably a little more resistant to damage from bangs and bumps as well as UV rays. I'll sand between coats with 220, probably will need at least 3 total coats. we'll see.