I use candle smoke and red, blue or black markers. For metal, if I have to, I use Jerrows. Gets everywhere. Hate that stuff, but it works. I tried some lipstick once. Worked OK, but I just couldn’t resist trying it out to see how it looked on me. My wife had a lot to say about that. Can’t see why she got so excited – it was just an experiment and I gave her back the lipstick. What was left of it anyway.