With a new frame $3K-$4K plus shipping that is out of the question.
My frame is actually pretty good except for a couple of small areas I decided to patch due to rust pitting.
Where I am undecided for how to proceed is the scale that has formed between layers of steel at the forward frame head.
In one area I have cut out the back-side and will patch it. (Pics in the AM)
Without cutting the whole frame head apart I cannot reach this scale physically.
So this seems to require a chemical solution, but which?
Candidates in no particular order.
White vinegar soak. Cheap in quantity, claimed to be effective, probably slow.
CLR. Never tried it, label says removes stains, I have scale.
OSPHO, Never tried it, expensive in quantity, speed and effectiveness?
Vaporust, I use this often and am pretty happy with it. But enough to soak the whole frame head in would get somewhat expensive and I know it is slow or ineffective for heavy scale.
I will use thin blades to break up as much scale as I may reach.
It would be great to just have the chassis dipped but that is an extravagant expense even if I could locate a somewhat local facility doing that work.
So who has done this and what worked best - most inexpensively?