I bought two bottles of this stuff to convert the rust on our swing set. It comes in a dumbbell shaped bottle, no doubt to memorialize some executives at Rust-Oleum. I followed the instructions to the letter, shaking it extensively, then started to apply it. It has a squirt top and I only got about two ounces out of the 8 ounce bottle, but I could feel that there was still something in there. I ripped off the lid and found about six ounces of putty-consistency material. On the label it says they stand behind their products and we should contact their customer service department if we are dissatisfied with any. They don't give a phone number or address (surprise!). I tracked them down on the internet and emailed them, a month ago, and they have not answered. I guess I didn't realize how far behind their products they stand.
Today I opened the second bottle, and it was in the same unusable state. There is no way to tell whether you have a good bottle or bad bottle without breaking off the top.
I went to our sole surviving hardware store and got a bottle of Permatex rust treatment, and had no problems with it. You don't even need to use the whole bottle, because the Permatex has a removable lid.
Is the Rust-Oleum line of spray paints a low or high quality line? The stores here seem to carry a lot of it, but I'm somewhat soured on them after my experience. Who does make quality spray paint?