[wang]

Hi mate i repair blast gear for a living.If i were ever going to blast a car of mine i would only use PLASTIC media.It will only remove paint it wont remove any metal and wont generate any heat so no damage to even the most delicate panels.Soda will do the same job but most soda guys use water injection so the raw material is wet and will flash rust soda gets into everything inside panels and is so fine you cant get it out.A lot of panel shop i know wont touch cars that have been soda blasted.
A lot depends on what preparation you do to stop media getting inside sills ETC because blasters dont care and no matter what media you use it go everywhere.
Garnet/steel grits will all remove metal which can cause warping (not long ago i told this guy doing a xa gt not to blast his roof the way he was doing it.He keep going and ruined it.now its got 1/2 ton of bog in it)
I would be rubbing back what panels you can and only be blasting engine bay/door jams and underside.
Garnet is good for things like suspension components

Cheers CRAIG