Well if its any constellation, it took me over 2 weeks to clean mine when I picked it up in St Louis.
But here is a before and after so this will give you an idea what it will look like when you are done. I can not stress the importance of taking your time, but the results are worth every minute spent!!!!
Billy
Before
[ATTACH=CONFIG]25150[/ATTACH]
After
[ATTACH=CONFIG]25151[/ATTACH]