I highly reccomend these little poms, they're great for application of chalks. You can use them over and over again, just keep one pom for each shade of chalk that you use. I've had my poms for more than a year, and they're still holding up well and not falling apart or loosing their shape. The small size gives you good coverage in tight spots.
I find that you can use them over and over again and they work better than anything else. I have tried some other applicators and not been satisfied.