Hi saw some rust treatment in my local shop, think it was made by hammerite and was called "krust"
Is this any good, im looking for something you paint on to the rust, and then it chemically transfoms the rust and kills it off (i think )
I don't know the answer but I'm pretty sure you mean Kurust rather the Krust.
Quite a few people recommend using it so I guess it's not too bad, although with much of Hammerite's product range,
there may be a cheaper alternative!