Yeh I used AG Engine & Machine yesterday, after driving about 1000 miles on motorway and B roads, through rain and snow. Simply spray liberally round the arches, then use a brush or a sponge to aggitate. Then rinse off. I finished with some CG Silk Shine dressing and CG vinyl dressing for looks and protection - worked a treat.
I've got ALOT of grease!! Is the AG stuff strong enough??!
This any good to you Ali, straight from the master too.
http://www.detailingworld.co.uk/forum/showthread.php?t=899
I use either of the 2 in the post above yours on mine these days.