Indeed that is true, but the point is Nelson paint is in the business of selling to modelers. I think it is safe to assume that if the manufacturer changed the formula such that the chemical resistance would be altered, Nelson Paint would know about it.

Although some may get a thrill finding a can of Hardware paint in the .99 cent bargain bin that is fuel proof under certain conditions, there is no way to know when the manufacturer changes the chemical resistance of the product to meet some more pressing requirement. Furthermose as the paints are not designed for chemical resistance to begin with there is little motivation to retain that paint feature if it ever existed in the first place.

It is only by chance a particular can works for your purpose, the same can from the other hardware store down the street may not.

The point is that using any paint in a manner not suited to it's intended purpose is risky and requires close attention and control. I guess testing harware store paint on your model IS a part of this wonderful hobby but be aware that the odds of success are low and other MORE SUITABLE alternatives ARE AVAILABLE.