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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wash, Wax, Detailing and Cosmetic protection/repairs > Under bumper scrapes, any DIY?



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      06-13-2013, 01:47 PM   #1
Karura
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Under bumper scrapes, any DIY?

Having driven the car for 10 months with minimal scrapes, I backed out of the driveway too quick and this happened.



It doesn't bother me too much when it's concealed, but since the car is AW, and it is clearly visible if you stare at it, I was thinking of getting the paint chip repair stick.

Any suggestions on a DIY? What other products should I get, like the scratch repair ones. Trying to do this quick and painlessly.
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      06-13-2013, 01:56 PM   #2
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ouch! i have the same issue but black...have to really look hard to see the scrapes, but of course, i spot them immediately...
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      06-13-2013, 01:57 PM   #3
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Respray is the only way.
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      06-13-2013, 02:11 PM   #4
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Pretty normal. Maybe a simple touch up paint or polish would help. I don't really worry about that area because it isn't very visible.
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      06-13-2013, 02:17 PM   #5
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yeah. i mean, if your serious enough remove bumper, sand down scratches (body filler if needed for deep scratches), repaint+clear coat. Could be a fun weekend project.
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      06-13-2013, 02:25 PM   #6
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When can you really see that, you pretty much have to be laying on the ground!
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      06-13-2013, 02:34 PM   #7
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Quote:
Originally Posted by roadkillrob View Post
When can you really see that, you pretty much have to be laying on the ground!
...maybe OP is really, really short...u got something against short people, roadkill?
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      06-13-2013, 02:43 PM   #8
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A few of those scratches look rather deep. The BMW touch up paint is more for light scratches as it's not going to fill them in. I'd live with it for a while then have it resprayed when the "time is right"
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      06-13-2013, 02:50 PM   #9
Karura
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Haha, I'm pretty average height; that said, there's nothing wrong with being short!

It's hard to tell from the pictures, the two circled areas have much deeper scratches, which are visible from a higher angle. I am pretty sure they were caused by the small branch I hit on the highway. I mostly want to repair the circled areas.

The plastic feels kinda rough, and may need some sanding, so I was thinking of just sanding it and applying the paint touch-up.

What would you guys recommend? Just apply the touch-up stick without sanding? It feels fairly intuitive to do just that, but I am fairly inexperienced, and suggestions are helpful.

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      06-13-2013, 02:51 PM   #10
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Quote:
Originally Posted by ECSTuning View Post
A few of those scratches look rather deep. The BMW touch up paint is more for light scratches as it's not going to fill them in. I'd live with it for a while then have it resprayed when the "time is right"
Didn't see your reply while I was posting; will probably do this. Thanks
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      06-13-2013, 03:02 PM   #11
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Chips and scrapes in the front bumper area is pretty much inevitable. I just clean the area and put some touch up paint over it. Not sure if its psychological but I always feel that if I don't put paint over it the paint will chip off easier in those areas moving forward
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      06-13-2013, 03:14 PM   #12
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Happens to literally everyone. Respray is where it's at, but ask yourself if you really care.

My front bumer is a complete mess if you're laying on the ground. Most of it isn't visible at all unless you're down there, though, so I just don't mind. There's ONE spot that comes up just high enough to be visible when you approach the car standing, and it bugs the hell out of me.

I've got a full kit worth of stuff (plastic parts adhesion helper, primer, base, clear, tack rag, sandpaper) from automotivetouchup.com ready to go, cost about $50 total. I'm just waiting for a free weekend to try my hand at repainting the spot.
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      06-13-2013, 03:44 PM   #13
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Automotivetouchup makes high quality paint and even has colors for all makes and models in spray cans.

For an area like that I would fill deep chips with Bondo, sand, wash and scuff up bumper a bit, spray one or two coats of primer and then spray two coats of color. Polish it out and it should look really good. If you mask carefully you probably will not even need to remove the bumper.

One other option- the dealers use painting services to touch up their used cars, etc.. Some of these guys do a really good job. See if you can connect with them and work out a deal with them to do work without dealer involved. They can't do a perfect job because they paint in the street but for an area that is not really too noticeable like yours it should be fine and not too pricey.

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      06-13-2013, 04:03 PM   #14
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Has any tried touching the scratches up and apply something like Scotchgard™ Paint Protection Film over the area? May take the curse out of the damage and add a layer of replaceable protection.
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      06-13-2013, 05:12 PM   #15
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Quote:
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Has any tried touching the scratches up and apply something like Scotchgard™ Paint Protection Film over the area? May take the curse out of the damage and add a layer of replaceable protection.
For the cost certainly not a bad idea. I'd be worried about it not making a huge difference since the road is much harder than the film, but hey, if it's only a tener or two to try.

Any idea where to get it in arbitrary size sheets?
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      06-13-2013, 05:31 PM   #16
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White plastidip might work too.
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      06-13-2013, 07:23 PM   #17
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Quote:
Originally Posted by alexwhittemore View Post
For the cost certainly not a bad idea. I'd be worried about it not making a huge difference since the road is much harder than the film, but hey, if it's only a tener or two to try.

Any idea where to get it in arbitrary size sheets?
It comes in different widths: http://www.amazon.com/s/ref=nb_sb_no...ilm+protector+
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      06-14-2013, 03:56 PM   #18
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Regarding the clear film idea I had a bunch of small chips on my hood. I went to several body shops and they wanted to re spray the hood. One body shop owner told me to touch up the chips as best as I can and then put a clear film protection on it.

I am pretty good with applying and leveling out touch up paint so I worked on this in my spare time. Once completed I had a clear Venture Shield applied to entire hood and partial fenders. It actually came out looking much better but the film is so clear that in bright sunlight you can kinda see where the touched up spots are. You need to get really close up to hood to see it. I was happy with this solution since I did not really want to remove the factory paint and re paint for some chips. The clear film does kind of make paint blemishes less noticeable. Your defects would need to be somewhat repaired before you should consider applying clear film or you will see defects right through film.

I think that a spray paint and then clear film which has clearcoat should work out very well.

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      06-16-2013, 04:19 PM   #19
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I have the same problem.. But a bit worse. Ive been debating on whether or not to just completely replace the bumper.
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      06-16-2013, 04:36 PM   #20
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I would get it fixed and then cover that lower bumper with Paint Protection Film
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      06-16-2013, 05:54 PM   #21
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Buy a lip
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      06-16-2013, 06:20 PM   #22
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Buy a lip
YEH RIGHT, THEN LIP WILL GET SCRATCHED
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