Thank you Donna .. not a whole lot .. few weeks at the most .. the cold wax cures the oil up quickly ... of course I use more than they suggest and they suggest to use it on board or some stiff support but I use it on paper at close to a 1 to 1 ratio .. wax and paint. Works for me. I have papers over a year old and no sign of warping .. crap, I've had panels warp more.