Has anyone ever used or heard of any of the above products.
Have some pretty good claims:
taken from
http://www.ppc.au.com/
► Easy to use requires no effort even on heavy rust
► Doesn't require constant attention - frees up valuable man hours
► Economical in use - concentrated powder dissolves up to 1 part in 19 parts of tap water to produce a powerful solution that can be reused
► Harmless non-toxic and biodegradable
► Produces a microscopically clean bare metal finish (even better than a blast cleaned surface)
► Does not destroy or distort delicate steel
► Harmless to glass, plastics, aluminium and chrome
► Gets into every flaw and crevice - the only way to get intricate parts totally clean
► Works on internal surfaces of hollow objects and structures
► Eliminates grit embedment - a recognised problem with blast cleaning that causes premature coating failure and destruction of engine parts upon reassembly
► Frees rust frozen parts, without the need for heat - will not anneal heat-treated components
► Based on renewable resources
So basically you drop something rusted to kingdom come into a container of this stuff mixed with water and in 24hours it comes out with no rust looking as clean as a whistle. Supposably better than blasting or using wire wheel etc
Also you can get it in a gel so you can use on bigger stuff too (there is a minimum metal thickness though) - looks pretty good, if it works on sheet metal may buy some and see if it works on my shell - doubt it will put back the metal that the rust has already eaten though
For more info have a look at the site above, there is a link on it with more info etc etc