I'm trying to find a you tube clip of the machine /gun that mot testers use or used to use to check for rust holes but I don't know the name.

It was like a gun and had a bunch of projectiles that would punch out into the bubbled area and clear away rusted metal.

It looked lethal but you could punch it into the palm of your hand and it wouldn't hurt.

I remember watch ester ranson do it on that's life, ah hem, just a couple of years ago, coz I'm young me. Lol

Anybody know what they're called so I can find a clip.

Thanks

Jason

Like that??
http://www.toolplanet.com/product/Stark ... air-chisel