grit/sand/media blasters for seams?

[volks_womble]

Several people have mentioned using small spot blasters to clean seams out and for small areas ahead of welding.

Are people using grit or sand or another media (soda, etc)?

Similarly, can anyone recommend a blaster that will work for small areas occasionally that I can run off my 50 litre belt drive 3HP compressor (unkown cfm I am afraid...)

Cheers
Mark

[boatbuilder]

Crushed glass

[volks_womble]

What sort of gun are you using?

[Plasticman]

J blast superfine from hodge clemco ,£6 per 25kg
Any cheap generic blast gun sub £25
mm