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Old 07-25-2011, 03:39 PM   #1
KaptainKandy
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Default Rust Bubbles on Roof

So today I saw something I had hoped to never see on my car, rust bubbles. Or at least I think that's what they are. In three locations on my roof I found very small clusters of bubbles (smaller than a dime) surrounding a rock chips that I had touched up awhile back.

Can anyone think of which steps I should take to repair it? I realize the only real way to fix these trouble spots would be to sand down to bare metal, than prime and paint but since these areas are larger than your average rock chip I think touch up would be stretching it without looking obviously touched up.

Do I bite the bullet and have the whole roof sanded bare and resprayed or can I have these areas spot repaired to cut down costs without having it look
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Last edited by KaptainKandy; 07-25-2011 at 05:01 PM.
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Old 07-26-2011, 09:37 PM   #2
Mark Grant
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If you don't mind the touch up being obvious there are ways around it. You need some naval jelly or rust converter like rust prep. http://www.wattsmotoringaccessories.com/rustprep.html

You need to sand the paint back beyond the bubbles a little bit to make sure you get it all. hit it with the converter then touch up paint. If you did it with an airbrush it would look pretty good.
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Old 07-27-2011, 06:02 PM   #3
WrxWrb
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Naval jelly is awesome !
Had a friend use it on his civic and it worked perfectly.
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Old 07-29-2011, 12:55 AM   #4
Vater
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CF vinyl?

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Old 07-29-2011, 11:48 AM   #5
KaptainKandy
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Quote:
Originally Posted by Mark Grant View Post
If you don't mind the touch up being obvious there are ways around it. You need some naval jelly or rust converter like rust prep. http://www.wattsmotoringaccessories.com/rustprep.html

You need to sand the paint back beyond the bubbles a little bit to make sure you get it all. hit it with the converter then touch up paint. If you did it with an airbrush it would look pretty good.
I figured that I may end up having to repaint the whole thing anyways and scratched away at a small portion of the tiny bubbles but no rust seemed to be there

Feeling hopeful but maybe it isn't rust but don't know what else it could be. The bubbles are like the size of a pin head and a little smaller than the diameter of a dime. Regardless I will watch these two spots with a close eye and if they get bigger I will just bite the bullet and have it repainted.

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CF vinyl?

Would probably cost me almost as much for the vinyl and install than having the roof repainted I would assume.
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Old 07-29-2011, 04:21 PM   #6
MattTHEpainter
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Where on the roof are the rust spots located? Pictures? I don't think covering rust with vinyl would be the best way to "fix" the problem. Repainting the roof is easy on a Subaru because the drip rails break up any adjacent panels from having to be blended (obviously trusted in the hands of a professional).
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Old 07-30-2011, 02:13 AM   #7
SubieDugie
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So you saw bubbles in the clear coat that didn't have rust under them and when you scratched away the clear coat there was no rust? That is what I am gathering. It could be debris/contaminants that were on the paint before it was cleared. Are you sure that the spots you are seeing weren't repainted before you got the car? Pics would really help.
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Old 07-30-2011, 04:05 PM   #8
AWDailyDriver
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Quote:
Originally Posted by SubieDugie View Post
So you saw bubbles in the clear coat that didn't have rust under them and when you scratched away the clear coat there was no rust? That is what I am gathering. It could be debris/contaminants that were on the paint before it was cleared. Are you sure that the spots you are seeing weren't repainted before you got the car? Pics would really help.
I have to agree.

Kaptain, considering that the "bubbles" are pin-sized as you said, sounds like the car (the roof at least) was repainted and maybe you just didn't notice the "bubbles" beforehand? Good prepping goes a long way to a good paint job. Again, pics would help.
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Old 08-04-2011, 12:52 PM   #9
KaptainKandy
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Originally Posted by AWDailyDriver View Post
I have to agree.

Kaptain, considering that the "bubbles" are pin-sized as you said, sounds like the car (the roof at least) was repainted and maybe you just didn't notice the "bubbles" beforehand? Good prepping goes a long way to a good paint job. Again, pics would help.
I have had the car since new(ish) and when I picked the car up at the dealership it had 6 miles on it. ~70k miles later the car has had it's rear bumper resprayed but the roof was certainly never touched.

I will try to post pics as I know it's impossible for anyone to make heads or tails without actually seeing it.
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Old 08-04-2011, 03:49 PM   #10
zombor
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I've got two of them on my roof. Every body shop I went to said they'd need to redo the whole roof. I'm getting it done along with my hood and bumper (chips galore) next week.
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Old 08-04-2011, 04:17 PM   #11
KaptainKandy
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Originally Posted by zombor View Post
I've got two of them on my roof. Every body shop I went to said they'd need to redo the whole roof. I'm getting it done along with my hood and bumper (chips galore) next week.
I'm assuming by redo you mean respray? If I was told they would need to replace the roof I would crap my pants and make a sunroof. I think mine must be rust because it surrounds two rock chips but the bubbles seem so small that it must be relatively superficial.

Sorry to pry and you don't have to answer but how much is it costing you to respray the roof?
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Old 08-04-2011, 04:22 PM   #12
zombor
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Right, I meant strip down to bare metal and repaint/clearcoat it

Quote:
and make a sunroof
Already got one, I don't have to worry about that...

Quote:
Sorry to pry and you don't have to answer but how much is it costing you to respray the roof?
Not sure about just the roof, but everything I mentioned about was quoted for 700-800. I had 3-ish quotes done and that was the cheapest...the others were 1200 and 1800, so it was all over the place.
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Old 08-04-2011, 05:14 PM   #13
SubieDugie
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I was quoted $800 a few years back at a "custom" paint/body shop here in V.B. That was to repaint the hood and both fenders. I am glad I didn't have them repaint though, as the door they painted from an insurance claim, ended up getting chips on it(and not from door dings either) within a few months. So I imagine the hood would have been even worse considering it is a much higher impact area. You can get a 3M SMART paint repair done for probably $100 or so. If anything I would look into the Dr.Colorchip kit or some manufacturer touch-up paint and a Langka kit. Sounds small enough and in a place that touch-up would not be very noticeable if done right/carefully.
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Old 08-04-2011, 05:20 PM   #14
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I use Dr. Colorchip on my doors and side fenders. It's not going to fix rust bubbles on a roof panel though.
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