When I done my chassis I used them grinder wire wheel things and they are awesome!
The Cup type I used on me big grinder was savage so moved to a smaller 4" jobbie from Trago for fekall, they are good but please for the love of jean paul use eye protection as them wires when they fling off are nasty got one wedged in me lip went in about 10mil

And me trousers were like a hedgy pigs back

Seriously though they are nasty things, I also had it wind itself up in me jumper when I lost grip of it when the grinder 'took off' cause with them cheap 4" grinders they don't have a 'press and hold' switch so you push em and they stay on so when I lost grip of it, it flew into me top and caught the fabric and wound itself up.
Could ask the pope:doh: feck I was trying to post with out mentioning the pope! Fek Fek Fek:doh::doh::doh: