I don't know if Kevin S is still active in the hobby in any capacity anymore. I was going to play around with some bleach last weekend...but decided against it as I'd presume the damage would be obvious. Additionally I don't think there is such thing as a $5 common t206 anymore...now $10-15!!!!!!
It'd be interesting to formulate a panel of "experts" like Dick Towle and Kevin Saucier to discuss such "chemicals" and ways to detect them...if any?