What's The Best Way To Clean Badly Stained Alloy And Aluminium

[HI PSI]

Hi all,

I just purchased a 2010 kx450f from a police auction. Unfotunately the bike had been stored out in the weather after it was siezed and it still had mud all over it. As you could well understand this has stained all of the alloy frame and engine casing.

I have scrubbed alot of the frame with reasonable success, however, there is still brown staining in some areas. the motor itself is next to impossible to do without removing the engine and I am looking for a less physical way to do it.

What would be the best way to removed the stains and buildup, are there any chemicals that would give me a better result and would be less labor intensive?

Cheers

Brad

[Impellor]

I'm not sure if its still available, but hydroflouric acid is the best alloy cleaner on the planet. But also one of the most dangerous. Gloves and mask if using.

Cheers

[--Jase--]

Or paint it with alloy coloured engine paint..

http://www.motoiq.com/magazine_articles/id/2761/wrench-tips-31-cast-aluminum-in-a-can.aspx

I tried this stuff for the first time on a mates engine I just finished building.. Its awesome stuff..

Fitted brand new cast parts to the painted block and the colour is almost exactly the same..

Wish I'd know about this stuff years ago.

[SLY6T]

Wire wheel on air or angle grinder.. take ya time dont push really hard

..then scotch bright pad and a light metal polish..