I really like Kevin Cameron....he is a great writer and pretty darn smart.
I made a mistake about a year ago.....I put some brake caliper piston seals in my ultrasonic cleaner with a little bit of the Stoddard Solvent from my parts cleaner. The seals swelled up and wouldn't fit in the grooves anymore......a new set of seals was $60.
Now.....I only clean brake caliper seals with soap and warm water - lesson learned.