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Old 01-22-2010, 03:24 PM   #1
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Best way to repaint a bumper?

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?

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Old 01-22-2010, 03:26 PM   #2
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sand down the edges and give it a try.

Is the original paint or powder coat?

IF its PC I'm not sure what kind of luck you'll have painting over it. but the worst that'll happen is you have to redo it.

Personally I'd sand the whole thing down and do it right the first time.

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Old 01-22-2010, 03:36 PM   #3
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I go with start from scratch then you know what you've got. It'll be complete and you'll be alot happier in the end knowing it's ALL done.
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Old 01-22-2010, 03:39 PM   #4
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If its just the ends, sand and repaint.
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Old 01-22-2010, 03:55 PM   #5
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I had the same issue.

Here it was when I got it




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.
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Old 01-22-2010, 04:30 PM   #6
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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.
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Old 01-23-2010, 09:14 AM   #7
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What would you guys recommend to use to grind down the rust and rough up the paint? I think I'll go balls deep on this one and just repaint it for a nice finished product

BTW I'm pretty sure it is powder coated, the paint flakes off in chunks and its very thick. However it wasn't as bad as I perceived at first
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Old 01-23-2010, 10:02 AM   #8
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I think I used 180 or 120 grit with an electric hand grinder. I don't know what kind of paint you are planning on using, but the spray on bedliner covered the grinding marks pretty well.
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Old 01-23-2010, 11:30 AM   #9
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I just talked to my dad and he said its too cold for spraypaint right now, something I completely forgot about... looks like I'll be saving this for spring/summer and just throw the bumper on now
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Old 01-23-2010, 02:44 PM   #10
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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.

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