I get my Flitz here:

http://pinrestore.com/Supplies.html

Pay attention when you're buying it to make sure you're calculating price per oz - there are at least 2 sizes, 7.6 and 4 oz, or something close to 4 oz. I've found it a little cheaper online, but every time I get a source, the price gets raised. Not sure I understand why.

Interesting on the use of windex - that's something I have to try. Curious on how much of a difference the boiling water makes.

Thanks for that info, John - I might have to order more and stock up on Flitz !

The boiling water / Windex trick with METAL parts only works a treat. I NEVER wash plastics etc using the described method. Basically - I stumbled across the method when I was doing a filthy pin some time ago. It had the "white mist" of corrosion and some of bolts etc were rusted. I simply emptied the hardware into a bucket, sprayed windex and poured boiling water on it and left it over night. The next day, the water looked more like a cup of Tea with no milk ! It was a copper color. I dried them and then had to soak them in Ranex to remove the rust. Then they went into the tumbler.

The "boiling water and windex" method is one I use all the time now on all hardware to remove all traces of dirt and grime before placing everything into the tumbler.

Windex does not leave smear marks on metal post re graining.