Originally Posted by arc190
I don't know about all permanent markers, but Sharpies wear off pretty quick. I colored my HVAC bulbs red and started noticing them slowly changing to pink within a couple weeks. The condoms should work good, but it's kind of discouraging that it costs less than $2 to buy them, but after tax and shipping it's $10.
...that's interesting.....my boost/egt have been colored for....well...almost 2 years now.....and still are green enough.....
....mebbe the red isn't as good or the lights are hotter and eat the dye faster.....