Saw a programme from the US where they used a blasting system to take paint off a plastic train, it used crushed walnut shells and it worked really well. No paint left and no pit marks or distortion. According to them one of the problems with shot and sand blasting is the heat generated and it doesn't happen with crushed walnut shells
I don't know if you are looking for something like this.
I recently bought a sandblaster airbrush over the Internet
It quite a handy tool it strips paint it cleans bras parts and makes the surface perfect for paintwork.
In my view it's a good investment.
The only thing you have to do Is to make a box to use it in. This prevents blasting sand all over the room, and if you build it smart you can recycle the sand for a few times.
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