Normally just use some all purpose cleaner/degreaser, but there's a fair bit of tar build up and the plastic liners are looking a bit faded, so ordered some AF oblitarate to tackle the tar and chemical guys bare bones to keep everything protected and make them easier to clean next time.
Should have got the jet wash on them, but I have a couple of paint chips right on the arch and didn't want to make them worse, new stuff arrives Friday so will give them another go.