good idea Ash, unfortunately I don't actually have another 2 BMW wheels to go on the front, well, I do but they are the old horrid metric rims.
As far as blasting the wheels is concerned, I'm going to remove the rust and paint with coarse white aluminium oxide then finish blast with much finer pink aluminum oxide, at about 30psi this leaves a surface perfect for painting, even on cast ally. We have an aircraft paint shop next door and it's how they do it, and if it's good enough for them then it's good enough for me.
As Ozzy well spotted, I'm doing things very much Locost.
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