304 Stainless Steel Wire Rope Cable, 3/16", 7x19, 250 ft reel

No, it isn't available in 100' spools.

I don’t think paint would stay on stainless.

no it can't that if you are talking about a person. longer the wire less strong it is

Don’t think so

it should not rust contact seller and have it replaced.

This Stainless Steel Cable is made of stainless steel, which is more difficult to rust. But stainless steel is also related to the installation environment; if the environment is more acidic, or acid rain weather, seaside, etc., it will be more easy to cause stainless steel to rust. So if you want to extend the life of stainless steel, you should take regular maintenance of it. If there are slight rust spots, you can apply a little rust remover to prevent the damaged rust spots from expanding further and reduce the corrosion spots.