What do you think Piers are you going to give this stuff a go? I suspect the underneath of your rx looks like mine - dreadful, thus causing you to broach the subject. I was considering a professional outfit using Dinitrol, I like the sound of the firm in Spalding (rust master, or blaster, or buster...) but it's too far for me, but there is a place in Yorkshire called jr classics who have a good reputation. A dear do though, probably half a grand, give or take a hundred pounds...
For I were to try this ACF-50 stuff what sort of preparation must I undertake? Scrabbling about underneath the car with a wire brush? I would appreciate some advice from anybody who has tried it already. I would be an.e to use it on my motorcycle as well, but I'm worried about it leaving greasy residue - does it?