As others have said, if it's fixable, the sprays will work wonders. I've had great success with Nikwax. I used the nikwax pretreatment/cleaner as well. They say to use it to make sure that the garment is completely clean before applying the spray. I have not frmae of reference if it helped or not, but I figured for what the jacket cost, it was worth spending the extra couple of $ to clean it. As someone mentioned, if you try it, make sure to get the spray on treatment, not the wash in kind. The wash in one can/will coat both sides of the fabric. You only want the coating on the outside.