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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 07-07-2013, 01:52 PM
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Tar on the paint finish

I've read the bird poop thread, and already have an etched spot on my trunk that will most probably will have to be wet sanded to get rid off. Now recently I became a victim of tar on my hood. Well the tar was removed, but now there's a greenish mark on my space gray finish.
Any tips on rectifying this?
Thanks.
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  #2  
Old 07-07-2013, 02:45 PM
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This removes tar without a trace. Not Goo Gone .... Goof Off
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  #3  
Old 07-07-2013, 02:53 PM
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Quote:
Originally Posted by laser View Post
This removes tar without a trace. Not Goo Gone .... Goof Off
Thanks Laser, I will try that.
I assume I can pick it up in a local Home Depot.
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  #4  
Old 07-07-2013, 03:53 PM
roadkillrob roadkillrob is offline
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What did you use to get the tar off? Bug and Tar remover will remove it also - available at any auto parts store or a light solvent like mineral spirits that won't hurt the finish. Whatever you use, just either wash the car after or clean with some water to remove the solvent residue and you will need to reapply any wax or sealant as any of these products will remove that also.
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Last edited by roadkillrob; 07-07-2013 at 03:54 PM.
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Old 07-07-2013, 04:03 PM
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  #6  
Old 07-07-2013, 04:40 PM
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Unfortunately goof-off didn't help
It looks like it stained the clear coat permanently.
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  #7  
Old 07-08-2013, 01:00 PM
Ilovemycar Ilovemycar is offline
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Hmm. I like 3M general purpose adhesive remover, I almost consider it a must have (tar, wheel weight adhesive, reflector adhesive, cosmoline, whatever), but if goof off didn't do anything, I guess this might not either. (Always be careful on plastic, and in general I like to spray directly into a piece of surgical huck cloth.)

But I guess I would try polishing with your favorite type of cloth and finger, aggressive compound (M105, M101) and see how quickly it improves. If quickly, I bet it comes right out, if not, then... I might contact a reputable detailer, or otherwise possibly invest in a PTG. (I consider this a must have, but that's because sometimes I'm detailing quite a bit.) Between the etching on the trunk, this new thing on the hood, other issues in the future for any and all cars you care for, it's something you might consider, a decent one can be had starting at $200. Just keep remeasuring as you polish. I took out a couple of very large scratches on a jet black 5er recently, I probably only took off 1 micron or so, maybe a touch more. On the other hand, even more recently I took off half of a bird poo etch on a brand new Prius hood, and two microns disappeared with only very little finger rubbing (for perspective, the BMW was with my more powerful of two machines, max speed at 5 digit OPM, high pressure, most aggressive compound I had at the time), and the spot on this Prius hood is already super thin to begin with (ball park 89-92). Anyway, the below is only for metal panels, only reads overall thickness, you'd need a very pricey ultrasound unit to read on plastic, carbon fiber, and/or distinguish how much of the paint is clearcoat. General idea is that 80 microns is where the basecoat starts, but that is very general, some paint out there isn't even that thick even when including the clear (Mazda). $200 is not chump change, but if you save yourself from one clearcoat failure you already paid it off and then some. It's not like a job from a reputable detailer is much cheaper either.

http://www.highlinemeter.com/

Last edited by Ilovemycar; 07-08-2013 at 01:01 PM. Reason: typo
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Old 07-08-2013, 01:18 PM
fdriller9 fdriller9 is online now
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A good polish will take that out. Start with something mild, then go more aggressive if your confident.

Remember, let the polish do the work! Don't apply too much pressure or you'll do more damage!
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Old 07-08-2013, 02:01 PM
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Thanks for all the suggestions.
I will take the car in to a detailer to see what he can do for a reasonable price, it's just I know as soon as take care of that there will be another bird bomb on it.
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Old 07-08-2013, 05:47 PM
Ilovemycar Ilovemycar is offline
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Quote:
Originally Posted by lqaddict View Post
Thanks for all the suggestions.
I will take the car in to a detailer to see what he can do for a reasonable price, it's just I know as soon as take care of that there will be another bird bomb on it.
Yeah, that's what would be nice about having the PTG, because it's only a matter of time I guess. Anyway, I would maybe send this thread by PM to phil@detailersdomain.com, he looks to be around 25 miles from you, here is his contact info page here.
http://www.bimmerfest.com/forums/member.php?u=110403

If you never hang out in the detailing forums, he is our sponsor, and has countless pictorials if you want to see some of his work. I'm sure there are other detailers that are reputable near you, but at least you have one trustworthy place for now. And I'm positive he would have the super fancy pants clearcoat reading multi-thousand $ PTG too. Some might say that the UV inhibitors rest in the top 1/4 or so of the clear, but I'm sure he'd know better anyway. This is JMO, but I would only want proven, reputable detailers doing what you want here, and I would pay for that confidence. OTOH, even the most famous guys sometimes won't touch certain things, even if they're 99% sure it would be fine, because of that 1% risk, but this is just my semi-educated *opinion*. I'm curious what your chosen detailer says about this stain.

Last edited by Ilovemycar; 07-08-2013 at 05:48 PM.
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  #11  
Old 07-08-2013, 08:39 PM
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Tar on the paint finish

Quote:
Originally Posted by Ilovemycar View Post
Yeah, that's what would be nice about having the PTG, because it's only a matter of time I guess. Anyway, I would maybe send this thread by PM to phil@detailersdomain.com, he looks to be around 25 miles from you, here is his contact info page here.
http://www.bimmerfest.com/forums/member.php?u=110403

If you never hang out in the detailing forums, he is our sponsor, and has countless pictorials if you want to see some of his work. I'm sure there are other detailers that are reputable near you, but at least you have one trustworthy place for now. And I'm positive he would have the super fancy pants clearcoat reading multi-thousand $ PTG too. Some might say that the UV inhibitors rest in the top 1/4 or so of the clear, but I'm sure he'd know better anyway. This is JMO, but I would only want proven, reputable detailers doing what you want here, and I would pay for that confidence. OTOH, even the most famous guys sometimes won't touch certain things, even if they're 99% sure it would be fine, because of that 1% risk, but this is just my semi-educated *opinion*. I'm curious what your chosen detailer says about this stain.
Thanks again I will contact Phill to see what can be done about this, my trunk bird poop etch and a few other areas.


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