Per a friend, who is very "Anal", and did tons of investigation on detailing. I trust him, he just goes WAY overboard researching things.
There is only 2 or 3 actual manufacturers of clay bar in the world.

Don't quote me on this, but a high end detailer in the area gave a class and mentioned there are actually several grades. The color indicates the grit, yes it is mildy (very) abrasive.

__________________
KLK, MCSE

1990 500SL

I was always taught to respect my elders.
I don't have to respect too many people anymore.