like others have said the flatline is very picky with what paint it needs.....alot of people use high end paint like marbellizers, or evil...for us who cant afford the high end paint, i found that recon, that you buy from wally world works really good. I had been using visible impact, almost every one broke in my flatline, i then got about 500 recon from a friend and not one of them broke....they flew straight...so i would suggest recon myself