Any suggestions on how to mark my products so they can be identified?

Hey guys I have had requests to sign or otherwise mark my LDC's so customers can identify those made by me, any suggestions on how to do this? The problems I see is that they are powder coated and any engravings would most likely vanish when the powder is applied,plus with screw on LDC's where would you place any markings so they ended up in an inconspicuous place, nobody wants markings right on top of the shroud or LDC. Any realistic suggestions would be greatly appreciated, many thanks, Neil.
 
The problem with transfers is they are easily damaged and worn off, what I need is something simple to make them identifiable. The engraving would be OK but they cost about $1000 for the cheaper units. Maybe the stamped NC on the end cap would work, it should be simple enough to just stamp my initials on the end cap prior to powder coating as long as people do not copy it. I have had customers concerned that when they buy a used one it is actually one of mine and I know this happens because I had one returned to me that was damaged, not only was it a cheap carbon fiber wrapped plastic tube but the internals were also plastic, it was definitely not one of mine. 
Thanks for the suggestions I will look into the options mentioned and see which might work the best, many thanks for the suggestions, Neil.
 
Blackdiesel I am not sure how this would work, when you say place a sticker over the logo, how would the logo be applied? Then any area covered by the sticker which you say can be removed after powder coating will be left with no finish on it. Somehow the complete unit needs to be powder coated and have some form of identifying mark, I think the easiest suggested so far is to stamp my initials on the end cap prior to powder coating, that would be a permanent ID and should always be visible.
 
I like the idea of a sticker.

However I think you'd want some high quality adhesive on it. My suggestion would be to apply the sticker to the back of the unit so that it reads when its mounted. I think for your branding purposes, the sticker should be about the same diameter as the unit it's being applied to with the center cut out for the barrel.
 
"NeilClague"Blackdiesel I am not sure how this would work, when you say place a sticker over the logo, how would the logo be applied? Then any area covered by the sticker which you say can be removed after powder coating will be left with no finish on it. Somehow the complete unit needs to be powder coated and have some form of identifying mark, I think the easiest suggested so far is to stamp my initials on the end cap prior to powder coating, that would be a permanent ID and should always be visible.
I am saying make a sticker of your logo and place it on the LDC. Make sure the color is different from the powder coat. For example, if you plan to powder coat the LDC black, make sure the original color is different. The powder coat will cover your logo but not the color under it. After you remove the sticker/logo the logo will be stenciled on the LDC. 
 
 You might consider a custom heat shrink tube, they come many styles and colors, gloss and matte. They can be printed with anything you can come up with, including address, website, phone number etc.. All you need is a heat gun to apply.
The bonus is, no one can remove it without damaging it, the vinyl heat shrink is very durable, like you see a lot of battery packs wrapped in. 
We had some made with our company name to cover the service valves on airconditioners, so later we could tell if we serviced it or it had been tampered with.
 
Hi Neil,stamping a mark would usually show through powdercoat ,unless you are using a really thick coat or grafitti resistant powder like I used to use on public amenities(bus shelters.park play equipment and the like). It is almost a ceramic finish and can be cleaned really easily. If you are outsourcing the job try and test how deep a stamp you need to show through the coating.Try a custom logo if you can get one tooled.Initials are so easy to copy if you use generic machine shop stamps. 
Cheers Paul.
 
Neil, knife makers that deal in black powder era reproductions put a makers mark on their blades. For instance, Hershel House a very prominent knife maker has an HH followed by a couple of turkey tracks. Others have their own. You will always have people try to copy. Some gun makers will stamp something on the business end of the barrel. One maker who has built for me stamps a few small stars on the end of the barrel. Just a couple of ideas.