Westley's Bleche white
westley's is now black magic bleche white. not the same.
It's what I use on my 31Have always used Westley's as well.
Just did some research as well, to find out that in 2011 Black Magic bought out Westley's. According to some reviews that I have read, it appears that it may not be as good as it once was. What a shame...been using it for as long as I can remember.
I use Castrol Super Clean. Spray it on, give it a couple of minutes and a light scrub with a scotch brite pad and rinse it off.