I have done something similar with mine - although they were too red, I cut it back with acetone and started again to leave a little orange. Trouble, I think, the spray I used is designed to let the original light through. I tried the follow:
Clear bulb
Orange bulb
Orange LED Tower - from China, flashes too fast
Green bulb
Have stuck with the orange. Don't know if a red lens would work better with the green. If change to a colour bulb you may need to change the carrier - I just bought one from the post facelight lights.
You should be able to see what spray I used if you click Lights in my sig.
Good luck - it's a good look. IMO :wink: