There are a few things you can do to remove chemical stains from car paint. The first is to use a mild cleaner such as Windex or Clorox. This will remove the stain but may leave behind some residue. Next, use a hairdryer to heat up the water and then pour it over the stain. The hairdryer should help to break down the chemicals in the paint and make it easier to remove. Finally, use a vacuum cleaner and bucket to suck out the entire mess.