How do you remove concrete from metal and plastic?

I wasnt sure where to put this.

How do you remove concrete from metal and plastic? The reason is just today i acquired a faily large lot of construction equiptment. Pumps, pressure washers, generators, cement trowels etc. Any tips of "easy" ways of getting concrete off? Im stuck. Any help is appreciated. Thanks :grin:

 

Ahhh, good pair of gloves, eye protection and an air chisel with dull bit and a huge air compressor.

 

go to a contractors supply store and there is a product that does a nice job of removing dried concrete (and coincidently paint). The name is escaping me, it's been a couple years since I've used it. But be careful, it is potenet stuff.