Was it the 91% stuff or better?
Sounds like the 70% stuff with a reaction like that -- i.e. nothing.
I've had great luck with ELO in the past on stuff I've painted and had no reaction problems with Kato shells, but I've never tried stripping Kato paint off their shells, only my own (usually ModelFlex). I gave up on their paint a long time ago. I just buy an Undec shell now, it's worth the $20-30 to avoid the PIA of stripping them. I understand that's not an option on the SD45s though.