I recommend you try and buff the spay paint off with a good cleaner/wax. If that doesn't get it, you can use polishing compound, just be careful not to burn through the OEM paint. If only a relatively small area you can use 2500-3000grit sandpaper and when done it will polish right back up to OEM shine. Since you're kinda new to all this, I would take it to a detailing shop, (NOT a quicky paint shop!) and pay them to recover the finish for you. Unless you have damaged the OEM paint underneath, the spray can shit CAN be removed to good as new, but must be done carefully.