If anyone requires a sandblaster in the Perth area I'd like to recommend Autoblast in Myaree, family owned and run, small operation that can do as little or as much as you want, at very reasonable prices.
I've had an FC wagon shell fully blasted and primed -happy price and job, as well as K frame again happy price and job.
They will also undertake the rust repair if you want, but again finding someone these days who is friendly, helpful and economic can be a difficult task, so when one does it's worth sharing.
Dave