Thanks for the comments. I'm in the UK, so probably doesn't help much telling you who I used for the work, but it was Hydrographics camo & carbon fibre dipping services in kent and uk
- took about a week door to door. I think the guy is a one man home-based outfit.
It wasn't cheap - almost as much as the marker cost new (£100), but I'm guessing that in the US you'll probably have a larger hydro dipping market (given that it seems really popular with hunters getting rifle stocks dipped and we don't have much real steel over here), so costs may be lower.
Will let you know if it all peels off next week!