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Old 07-05-2018, 08:19 PM   #1
Johnny2R
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Problem with dried-on snow foam

This is a problem of my own making, but I'm hoping someone can help me. A little while back I gave my car a pre-wash foaming with Bilt Hamber Auto-Foam. Unfortunately, I was drawn away before I could get round to rinsing it off, and in the warm weather it kind of baked on, leaving pale streaks down the bottoms of the doors and what looks almost like limescale deposits along the bottom. The deposits are pretty hard and don't shift with a wash (nor a second treatment of Auto-Foam).

I got in touch with Bilt Hamber and they suggested using polish to shift the marks, but I tried today with Autoglym Super Resin Polish and I've not made much headway. I was wondering whether anyone else had had this problem before and had found a good solution. What could I use to shift these deposits which wouldn't end up damaging the paintwork?
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Old 07-05-2018, 08:44 PM   #2
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Use a polish...a abrasive polish!
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Old 07-05-2018, 08:54 PM   #3
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You could try something like Megs ultimate compound or AG paint renovator.

Neighbour used the AG paint renovator very successfully to remove some stubborn bird dropping marks - polish wasn’t roughing them, so certainly worth a try for you ?
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Old 07-05-2018, 10:06 PM   #4
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SRP is more of a filler polish than an abrasive cutting compound. You'd want something mildly abrasive, like a cleaner polish or a very light corrective compound. Megs ultimate as suggested might be a good bet, or a diminishing compound like Scholl S40.
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Old 07-05-2018, 10:13 PM   #5
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OK, thanks, I'll probably give Megs ultimate compound a go. Bit of a newbie at all this!
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Old 08-05-2018, 02:09 PM   #6
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So I now have my Meguiar Ultimate Compound, and am ready to give it a go. Assuming it works, what, if anything, do I follow it up with? I have Collinite 476S and Autoglym Extra Gloss Protection (as well as the Autoglym SRP, which I presume is the equivalent of the Meguiar so redundant in this case).

Also, someone remind me please (it's ages since I looked into all this and there's so much info to wade through), am I right in thinking that if I'm going to clay the bodywork (there are some little black specks on the roof, don't know what they are), I do this after washing but before the Ultimate Compound?
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Old 08-05-2018, 02:28 PM   #7
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Thats correct, clay after washing but before polishing. If you have some iron fallout remover, its always good to use some of that before claying then rinse off once its purple.
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Old 08-05-2018, 03:46 PM   #8
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Quote:
Originally Posted by Johnny2R View Post
This is a problem of my own making, but I'm hoping someone can help me. A little while back I gave my car a pre-wash foaming with Bilt Hamber Auto-Foam. Unfortunately, I was drawn away before I could get round to rinsing it off, and in the warm weather it kind of baked on, leaving pale streaks down the bottoms of the doors and what looks almost like limescale deposits along the bottom. The deposits are pretty hard and don't shift with a wash (nor a second treatment of Auto-Foam).

I got in touch with Bilt Hamber and they suggested using polish to shift the marks, but I tried today with Autoglym Super Resin Polish and I've not made much headway. I was wondering whether anyone else had had this problem before and had found a good solution. What could I use to shift these deposits which wouldn't end up damaging the paintwork?
Did you email us or phone? We don't seem to have a record? If the deposits are actual auto-foam they would be soft and easy to remove by soaking with a a continuous water flow of water - cold is better - then use mitt or sponge. If they are hard then is could be deposits from the water used in the mix, that's if it's a hard water area Please send a photo to sales@bilthamber.com
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Old 08-05-2018, 05:59 PM   #9
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It was an email exchange, and I thought your customer service was very helpful about the issue. Yes, I'm in a very hard water area here (although that won't be an issue from now on as we've installed a water softener) - so limescale certainly could be part of the problem. I may well try rubbing it with a lemon before doing anything else! Has anyone else used lemons in detailing before?

If it doesn't shift, I'll send a photo to you (Bilt Hamber).
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Old 08-05-2018, 07:35 PM   #10
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Well, no lemons to be found in the house, so I decided to risk some Viakal. And the streaks are now largely removed! I'll have to give them a second go, in better light, but I can tell from the smooth feel of the paintwork that it's done the trick. I'll follow it up with a Meguiars Ultimate Compound polish.

I can only assume that there was some kind of reaction with the foam and the (very) hard water, on a warm day. Anyway, I will be using softened water from now on and so hopefully the problem will never occur again (and I'll remember not to let it dry on anyway).
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