Vinylmation - Prepping Painting for Autographs Question

[xQuizx]

On our last cruise I saw a woman with a white and black vinylmation she was using for autographs.

I asked her where she bought them and she said that she had bought some inexpensive ones on Ebay, that were not originally white/black, and then painted them black and white for autographs.

I want to do the same thing for our next cruise and I was wondering what kind of paint I need to use to do this.

Any advice from folks who have done this in the past?

Thank you in advance!

Cheers!