Hank, how caustic is that 'Aircraft' simple green (odd, I've never heard of it, don't doubt it's out there though).
I think it is biodegradable????
It does not seem caustic @ all,, airplane products needs to be non caustic ,otherwise you could easily damage airplanes,I use it to clean airplanes & other nasty carbon build up ,espcially for the exhaust thrust reverser areas.
Not sure how long this product has been out for , but I would say for at least a year.
I can ask where we buy it from if you like.
MBHD