Thanks to the Internet and Pinterest - my Mom and I were inspired to Paint Ikea curtains for Baby Boy's nursery. It only took a few hours, and was so easy.
Step 1: Measure
Decide how big you want your stripes. The curtains I bought from Ikea were about 101" long so we decided to do 4" stripes with a little extra white space at the top and bottom. Math is not my speciality, so I had my husband figure it out for us. I started at the bottom and measured 4.5" inches, then 4" all the way to the top.
Step 2: Tape
Blue painter's tape worked fine. It was a little difficult to get the curtains completely flat even after I ironed them, but I was surprised at how little it mattered.
Step 3: Paint
I took Baby Boy's crib bedding to Home Depot, and had the perfect blue matched. It definitely didn't take a gallon, that's just what we ended up with. We used little sponge rollers, and they worked great. We only did one coat, but I'd probably suggest doing 2 coats. When we hung the curtains there were some less painted spots, and we had to go back and repaint those areas. They still don't look great, but would have if we would have done 2 coats.
Step 4: Hang
This isn't the best picture of the finished product. I'll save those for a later date - maybe when I get the nursery put together.