Can anybody recommend somewhere on the noth side of Brisbane I can get all my suspension, front beam and brake parts etc sand blasted? Also is it OK to sand blast machined surfaces such as disk brakes and spindle shafts etc or will this destroy the surface?

Machined surfaces should be protected from sand blasting, at work we used to cover the machined surfaces with a good grade gaffer tape. It helps if the operator uses some common sense while blasting.

yeah definitely not with the machined surfaces.. will ruin them