Well, I'd say it was a dumb question, except that when you don't know it's not because you're dumb, it's because you don't know the answer, therefore, it's not a dumb question.
/forums/images/graemlins/grin.gif
Fertilizer can be VERY corrosive, Clean after use.
As a matter-of-course, it will always be good to completely clean out your spreader making sure it's fairly dry if being placed where it can't easily dry off. Also, it doesn't hurt to wipe it lightly with a cloth with some light oil on it either, but you would need to have a very light coat, and wipe it all off when you're ready to use it again. Cleaning though is the most important part. John