best markers for autographing carts?

[koifish | 556]

I'm going into a possible opportunity to get a favorite game signed and I was curious, what kind of pen would last a long time on a game cart (plastic and label)? Since it's a dark label I was going to use a thin point silver sharpie, but if another pen has better hold then I could try and get one. This question may be anathema to many here (as we more frequently are trying to REMOVE pen, rather than add it) but I think in this case it's worth it to make the exception.

[SilverspoonGaming | 332]

I have always used sharpies.  Usually black, silver, or gold.