I did mine over winter.. I removed the bumperettes, welded, sanded, filled and primed them myself. Took them to the paint shop and had them sprayed. Cost about $350.00. Here's a before and after pic..
If you have chrome bumpers and want them painted you can take them to a place that does powdercoating and get them either powdercoated or just blasted with Aluminum Oxide then painted. I know my Powder coater charges $55 an hour for just blasting. The blasting will remove the chrome plating leaving a paintable surface.
Got mine redone in gloss black powdercoat for $400. Removed and reinstalled them myself. They match perfect and no rock chips. Took about 3 weeks to get them back from the powdercoater though.