Here are pictures of my set up and results:
http://www.bikepics.com/pictures/2164720/
http://www.bikepics.com/pictures/2164722/
http://www.bikepics.com/pictures/2164724/
http://www.bikepics.com/pictures/2164726/
It worked well. Simple and inexpensive. This is what i learned:
1. Use a face shield. Goggles don't keep soda out of your mouth.
2. Wear a rubber suit. Soda paste gets everywhere.
3. Use more soda for more agressive cutting. About 3 pounds soda per gallon of water worked well.
4. The soda settled to the bottom. Constant agitation of the mixture is required. Or mix in small batches? This area needs improvement for next time.
As the day wore on, and not realizing the soda was settling on the bottom and the paint stirrer wasn't picking it up, the process slowed down to a snails pace.
Next time will be top ends. Though i will wait for warmer weather. It was cold and windy.
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MC21R9N track
MC18R2J track
CBR954
CR250