I have got my 400's and some old steel brake calipers back from Cleveland Chrome now.
I'll post some pics up later tonight, but thought I would say they have done a fantastic job, the only exception being the spider on the 400's. They did phone me about this as apparantly it is alloy and they could not guarantee the chrome taking - which it hasn't very well.
The chrome is very deep looking if you know what I mean and has been very well polished, unlike Castleford chromer (who did a reasonable job - when compared to this batch).
If you don't need stuff in a hurry, then consider these folks, £48 inc postage for 2 crank arms, and 4 brake caliper pieces (these were very rusty and I only sent them a a test to see how they would come out).
Paul