i have recently sent my 06 ego to sloth - it costs a bit but from what i've heard they do an amazing job - worth doing if u got the spare cash - i'd advise ringing them and getting all the details u need on the phone - but a quick rundown for u:
There is a standard £25 setup fee, then to anodise any parts starts at just £6 per part dependant on finish. It's an extra £1 for each part the finish change is required on. That means, for example if you wanted to change a part from having a neutral or dust finish to being a "high gloss" finish, then the part would be £7 instead of £6.
If you would like to fade anodise a gun, please add an extra £1 to all parts, so if the parts were staying the same surface finish but you wanted the gun to fade from one colour to another, each part would cost £7. If you wanted finish change AND fade on you parts, each part would be £8 (£6 base part price + £1 finish change + £1 Fade).
Custom graphics and tattooing are charged at £25.00 per individual logo, duplicates are not charged.
hope this helps
Ben