starbrite is muriatic acid i think. pretty much the same as toilet bowl cleaner....of which i've used. if you can find a scrubber on a long-handled brush, it will work even better. the trailer won't like it but maybe it'll knock some rust of for you, lol.

your rear ss rail is a little different from the older models. mine doesn't have the break in the middle. the rest looks the same.

she doesn't look that bad...just put the doghouse back down.