Here's an idea for a frame-soaking container based on Quixotegut's suggestion about fabricating a frame-shaped trough out of PVC tubing. After thinking about it for a while, I adapted that concept to this:

1. Make a wooden frame maybe 3 feet by four and 6 or 8 inches deep. Level it carefully on the ground in some convenient place and pack it solidly full of damp sand, leaving a smooth and level surface.

2. Cover it with a sheet of polyethylene and center the frame to be soaked on top of the sand, and push the frame firmly into it to leave an impression.

3. Remove frame and plastic and use a tablespoon or some other convenient tool to carefully excavate 2-inch-deep trenches in the sand corresponding to configuration of the frame--angling deeper for the chainstays to compensate for their outward flare.

4. Replace plastic, press frame down into the prepared grooves, then fill the low trenched area with OA solution. The advantage of this is that you're working with 3 or 4 gallons of toxic solution as opposed to 50 or 60 gallons.

5. When frame is clean, remove it and suck up the solution for re-use or disposal with one of those bulb syringes auto parts sell for adding acid or water to car batteries. Then refill with baking soda solution to neutralize the OA residue on the frame.

I haven't tried this yet but I don't see an obvious fatal flaw. I think I'll try it when I have time to strip the Dawes Double Blue to the frame.
JV