G'day mate

hopefully you have already removed it but my dear old dad all his life swore by Mr Sheen removing stains and grime from his car and brings the paint up
like a million dollars every time he washed his car he would dry it and apply Mr Sheen and hand polish
Any tuff spots just spray a bit on till it foams up leave it for a minute and hand buff off
it wont remove everything but you will be suprised what it will do and your car will look great

cheers
shane