Here is a few photos from using a rust treatment called Rust Blast from KBS Coatings, they had a stall at Volks World so thought I'd give it a try.
I started using the brush on liquid while I was fitting the rear arch panel. This part of the panel that needed treatment had been left bare metal for about 10 years while the van sat in the garage.
The instructions states you need to keep the metal wet for 20 minuts for light rust and 40 for heavy rust, this wasen't the case for me, It took a good few hours to get the lighter rust off with out any abrasion, probably something I could do quicker with a grinder and wire wheel.
Eventually the panel started to show some progress but with a lot of help from some scotch brite pad.
The results do look good but just take four times as long as it said on the tin. The Rust Blast is ment to leave a zink layer which gives it a grayish tinge.
The last bits of rust left were the pitted arears, when you apply the Rust Blast the corrosion in the pits turn a darker coulor and show up so making it easiery to see whats rust is left. These final bits I removed with a whire wheel, this dug deep into the pitted areas untill the material was shining and rust free.
