Poor Bonk

so in June we got a new driveway, and we are so happy. never thought I would rave about a driveway, but I do. one of the best things is that the kids have a great place to play now. they can draw with chalk on our driveway, something that just wasn't possible in its previous state. so this weekend the kids were drawing outlines of themselves, parking spaces for their bikes, Justin chalked up his tire and made all sorts of drawings. they entertained themselves for hours, a true blessing. alas Bonk may not feel the same way. he went and had a nice roll around on the driveway and now he is a little pink. anyone have ideas on how to get pink chalk off a cat?