[smykowski]

I agree with Mike, a good compound with the appropriate pad would get rid of ANY dull or hazy spots (aside from a true defect of course). At 50', I could see someone getting discouraged from the sheer size of the job at hand. At the minimum, I'd compound and follow with a one step cleaner/polish/wax, I think you'll be happy with the results. It all depends on how much time you have and how long your shoulders/arms can take the abuse.