I am planning to paint my hood and my bumpers using Duplicolor. I dont need professional results; just so it looks better than what it is.

any tips on how to sand it and what to use?(primer, etc.)

 

The instructions on the can should give you a pretty good idea of what to do. Make sure you get any and all rust completely out if you have some.

 

if you plan on spray bombing it, you won't get professional results, but if you do decide on doing it.
. sand until very smooth and all minor cracks in paint are gone(same with rust too.). try to use the same kind of primer. paint then finish it off with clearcoat keep at leat 8-10 inches away.
.you might be able to find your color in the paint isle at the parts store.
hope it helped