I have. I used red, black, and lime green.
I used a TBLS of vinegar to help set it and HOT!!!! water.
It worked just fine and saved me tons of money. Actually, I think
it worked awesome. I let the shirts sit inside a Ziploc bag for 24 hours and the color really was nice and vibrant. We still wear them and they have held the color. I would post a pic but I have trouble as I am not computer savvy and DD's are both at soccer camp....sorry.
I used to have it in my sig but took it off.
GO FOR IT! IT DOES A NICE JOB!!
Kelly