Not satisfied with not being able to eat off the underside of my project, I began the dirty job of getting it right...
(click on image to enlarge)
My first bit of advise... do NOT paint the car until you are satisfied with the engine bay and/or underneath the car... doing after the fact sucks...
Yah... I know.. should've done the bottom before the top... where the hell were you 6 years ago when I painted the car?
So, using an angle grinder, wire wheel and goggles, I jacked the car up and began grinding off 40+ years of crud and crap from under my project.
Using the tall jack stands, I had plenty of room to roll around on my creeper. Actually the worst of the entire project was the S#!* that kept flying into my face. I highly recommend that you where one of those painters ski masks to protect yourself.
Wire wheel on angle grinder stripping all grime, grit, crud and crap down to original red oxide primer.
Using Southern Polyurethanes, Inc. brush-able epoxy primer after using 180 grit to rough up for good adhesion and wiping down entire area to be painted with Southern Poly's prep solution.
Using gloss black, I painted all the frame rails from firewall back and all the brackets.
In the Wheel wells, I used Smart rubberized paintable undercoating for a good thick sound-deadening coating.
The underbody was covered using 3M "professional" paintable rubberized undercoating for a nice even more fine texture. Dried to a nice flat matte black.
The result is a clean uniform look. I really am happy with how the contrast of the gloss black frame rails and brackets are offset by the matte background of the undercoating.
I had even thought about painting the undercoating flat red but decided the black look so good, why mess it up.
click on thumbs for larger images:
Masking off frame which was painted gloss black
And the Finish.......