Couple nights ago, the village idiots decided it would be funny to throw those packages of mayo, or blue cheese dressings they give out at McDonalds onto my car. The car sat in the sun most of the next day till I was able to wash it. It doesn't seem to coming clean. I am just using regular car wash, and just trying to rub it out, but it doesn't seem to work. Is there a stronger type of wash I should use or is this a lost cause and will I have to get it repainted? Thanks for the help.