a friend of mine did it with red tape and it looks pretty good actually. I believe he just used red electrical tape. I couldn't tell until he told me and I looked up close, and even then it looked pretty decent. Maybe try this route and see if you like the red first? He's on this forum as well, so I'll let him chime in if he wants to.
The volk stickers on non-volks however, is just pure tacky IMO.