Hello 289Galaxie,Thanks for posting this as well as describing in detail how you are tackling this project. Kudo's!
I have a question and I'm not sure whether or not I missed the explanation. You stated that you used the Eastwood inner frame paint (which is what I was planning on using) and POR15. How did you get the inside of the frame clean enough for the paint to adhere? I tried blasting mine with a pressure washer but can only get in so far, especially in the rear frame arches and torque boxes. After I used the pressure washer I tried blowing the frame out with compressed air to both dry and remove anything else that may be left. When I looked inside the frame with my borescope, there was still a lot of oil/grease/crud in the left frame rail behind the front torque box. I was thinking maybe letting Engine Gunk soak for a while and trying the pressure washer again. Your thoughts?
As for cleaning the inside of the frame, it's a bugger if you have grease and other foreign bodies in there. There just is no easy way to get in there and clean quickly. All I can recommend is what you're planning and that this Gunk soak, brushes on flexible metal stems and to help speed things up spraying with acetone or lacquer thinner but that can get expensive depending how much you need.
For the home DIYer these are the parts of the process that's just bloody awful, but necessary.
Good luck and please feel free to us posted on your results!