There really isn't much you can do short of repainting sections of the truck and then blending the paint. That's a lot of work for paint chips.
If you want to prevent chips, you can get clear protective plastic that is for that purpose. I think Summit Racing carries it. If they don't, any place that sells automotive paint should.
I gave up on fixing most chips a long time ago...I get them on the rockers a lot, so I just clean them real well and spray some clear on there to keep rust away.