Removing a Stain on Polyester Cheerleading Outfit

You didn't say what the stain was but I use lemon juice concentrate and salt lay it out flat in the sun to dry. Depending on how bad the stain is you may have to do it more than once. I have used this many times for tough stains everybody says won't come out.
I lay my piece on a towel in the sun and pour the full strength lemon juice on it then table salt it real good and let dry. Re wash after or the spot will be stiff when you wear it.

Take a cotton swab and dip it in bleach, then swab the stain. Have the garment laying flat and stand there and watch the stain. If the stain doesn't completely disappear do it again. This should work, then rinse just the top part of the shirt, not the whole thing because that could make the bleach run into the colored part. Hope this will work.