When I purchased my 2007 some time ago, the previous owner stuffed the wrong battery in the box, with the tube on the wrong side, and the acid leaked out down the inside of the box and on to the bolts holding down the box and onto the frame and even out the toolbox. I've since washed these areas down with WD40 every couple of months and replaced the battery with a glass mat type.  Is there any product I can use to permanent stop the rust? It seems WD40 just holds the line and I hope it keeps it from deteriorating. I did some research on the net and there seemed to be some general remedies for rust, but they vary and I would rather trust this forum for advice.

yep, 1st kill the acid with baking soda.
then treat the rust with phosphoric acid, or naval jelly.
then spray paint over the treated areas.

My brand new bike from the Suzuki dealer had the battery vent just hanging in the battery box!! I plugged it in of course but at that point I vowed never to let anybody touch my bike. "Warranty be darned"
They are out there.

They also wanted $350 for the first service. I don't think so.

WD wrote on 11/25/15 at 15:26:54:

I just drooled

aircraft spruce inc ,carry's a randolph battery box paint .it works very well