i would try this,it cant make it look any worse, prob wouldnt last very long.get a can of clear at az.Well by "white spots" i guess you mean where oxidation has got to your clear coat? My friends dad used to be a used car dealer, he said use a razor and scrape the clear off, carefully so you don't scratch the paint underneath so all the white is gone then tape it off and spray some clear coat over it. I haven't tried it and im not telling you to but if you want an idea of what to do give it a try, he said it works but im just going to have my car re-sprayed in the spring.