Sharpie pens on poster??

[serenitynow]

Instead of an autograph book, my little guy has a poster with the characters that he wants to get autographed. But I am worried Sharpie pen will smear on the slick poster paper.

Any ideas for the best pen on poster paper?:confused3

[morgansmom2000]

You could try a Slick Writer. Not sure where they are sold, aside from online.