yeah cos powder coating an ego would looking just fantastic...
Im assuming that by wanting to reannodize a gun and enquiring about CCU kits you are after cosmetic results (ie vanity has got the better of you)
so the enigma is, if you want quality looks, why are you looking for the cheapest and ****test looking results?
Granted £150 is probably what the gun is itself worth but if a job is worth doing its worth ding well, and by having some backstreet powdercoat done on it youll probably do more harm than good.
theres a reason why sloth are 1 - the only place in the uk for custom anno to the public and 2 - charge a reasonable amount for the work they do
and that reason is: quality.