It's a problem to every chromer I believe - chroming Ally is a bollockache apparently.
For what it's worth, I've had some forks done at Hockley recently and the work was top notch. couldn't fault it. Chromoly though, not ally.
If you want show winning, concourse, I'm the bollocks look at me chrome, then I believe London Chrome is big in the custom car world. Big money for top work I think. No experience myself though.