I got out there last night and started working on the rear frame rails. Keep in mind I'm not doing a 100pt resto or building a show car. This is a functional car being done on an average Joe's budget. Media blasting the frame and grinding on it for hours wasn't in my agenda. Since the frame was already decent I only wanted to remove any loose rust and go the KBS Coating route again.
This is what I started with. No matter what kind of rust inhibitor/coating/etc you go with there's no way around flaky rust. Even with rust converter, the less rust you start with the better.
Quality factory welds eh?
Here's the same pic with the flash on. Notice the small hole in the middle of the weld.
This is after using a rust/paint stripping wheel (works great btw) and a wire wheel for the welds.
The Rust Blast converter being applied
After the rinse
Remember the hole I pointed out in the weld earlier? Since I had some of the fast-setting JB Weld laying around I decided to put it to use and fill the hole. While I was at it, I figured I'd just fill in the uneven areas of the welds to prevent anything from collecting in the crevices. Will it help? Maybe, maybe not.
This was after the first coat and it was still drying. I'll go back out in the garage today to get some better pics. You can see why I'm planning to use Eastwood's internal frame coating kit too. Also note that I gave the rail some healthy BFH whacks to knock loose anything before I got started. I also blew out the inside of the rail with compressed air to clear out the flaky rust.