I just got a free smittybilt classic rear bumper. The corners are flaking paint like crazy so I was wondering what the best way to touch this up would be? Should I grind the hold bumper down and repaint it or can I get away with painting the edges?
2002 TJ Sport 4.0
3" AEV/OME lifted
I sanded it down using a sanding disc on a grinder. I only sanded down to the metal on the rusty spots and just roughed up the good spots. Then I sprayed it with primer and then used Duplicolor spray on bed liner. It is holding up very well.
Make sure you primer it first. I built a grill guard and did not primer it before using the spray on bed liner and it is already rusting. Now I have to sand it all down and re-do the paint job. Cutting corners may save time now, but cost more in the future. I have definately learned this lesson.
Hope this helps.
__________________ 2013 Gecko JK Sport S
2015 Billet Silver JKU Freedom Edition
If you are not going to have the rust sandblasted, it would be worth it after you sand it down the best you can, to apply a rust killer on the bad spots, you can pick that stuff up at any parts or hardware store.
Then make sure to buy a "self etching" primer for your primer coat. A typical filler primer isnt doing much for you as far as sealing the metal and stopping future corrosion.
you would want to hit the rust spots with a 36 grit grinding disk. go over the grinding marks with 80 grit on a d/a sander, then the whole thing with 180, then 320 to finish it off. wipe it down with a wax and grease remover, prime, then paint. If you do not have a heated area to apply the paint in it is pretty cold for good adhesion and drying, but it can be done, just let is flash longer between coats and maybe bring the thing into your basement or something when you are done painting it and let the heat in your house bake it for you.