How can i change hair color to gray? it's for a performance.?

i'm doing this for a short film that i'm producing and i need to know if there is a way to color someone's hair gray using some kind of spray. i remember when i was in this 4th grade play and this teacher sprayed something on this kid's hair and hours later, it was gray. also in halloween like 10 years ago, i used a similar spray to change my hair color to green. where can i find these sprays if they exist? if not, are there other techniques or products i could use to accomplish this task without having the gray hair stay for a long period of time? feel free spill out every alternative.

How can i change hair color to gray? it's for a performance.?

Baby powder works very well. You can also go to any beauty supply store, or costume shop and buy the spray on hair color. It usually washes right out.

How can i change hair color to gray? it's for a performance.?

you go to WalMart or any drug store and buy washable non-permanent hair dye that you wash out and there are many colors to choose from and there is gray

How can i change hair color to gray? it's for a performance.?

do 20-30 hits of liquid LSD each day for about 2 months. then follow that up with a 3 week cocaine bender. You'll look like george clooney by the end of it.

How can i change hair color to gray? it's for a performance.?

I would use baby power...or some type of powder...thats what we did in the musical I was in last year

How can i change hair color to gray? it's for a performance.?

baby powder works really well

How can i change hair color to gray? it's for a performance.?

u canchange ur colour by highlighting ur hair if u want u can do permanant highlight or u can do one wash highlight that it can come out after a wash