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Old 23-08-2007   #1
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Surface rust removal

I just bought a Y Reg Punto 1.2 ELX, generally in very good condition and well looked after, apart from a long scrape low along the driver side door to the wheel arch. It doesn't seem to be scratched past the undercoat/primer on the door, but as it approaches the wheel arch, a couple of inches of bare metal's been exposed, which has started to rust. I treated this with Kurust, which seems to have done the trick but now the surrounding paint's slightly discoloured.

I'm no expert with this stuff so i'm reluctant to touch it again and make what was a small cosmetic blemish a lot worse, is there any way to deal with this discolouration, T-cut or something, or am I going to have to sand back the paintwork if I want to do a half decent job at stopping it rusting again? If so what grade of sandpaper will I need to use?
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Old 23-08-2007   #2
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Re: Surface rust removal

just take it to a bodyshop, cant be that expensive
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Old 24-08-2007   #3
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Re: Surface rust removal

Get a quote if your that bothered, or get touch up paint from fiat, i touched up, sanded down a few bits on my old punto and didnt do too bad a job, but if you looked carefully you could tell.

I'd guess it's metalic paint? Also how long did you leave the Krust on for? Did you try it on an unseen bit of paint first? Does it say it wont damage good paint, if so get onto there customer services as that could cause more bother cosmetic wise than the scratch.
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Old 24-08-2007   #4
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Re: Surface rust removal

If you have a look at a haynes manual or search the internet there are plenty of articles on repairing bodywork. The Krust stuff does stain and I think the instructions say, don't get on paintwork! Use something like a rubbing compound but you may well have to take the paint off where you go the krust. Try and localise just to the krust and remove until you get back to good paint. If you want or have to take it back to bare metal to repaint an 80 grit will get your there quickly. Once you start spraying, cellulose use increasing grades to flat back.
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Old 24-08-2007   #5
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Re: Surface rust removal

I was aware of the warnings on the Kurust that it may stain the paintwork and i'm absolutely certain I didn't get any on the paint and cleaned off what I did, nonetheless it seems to have reacted with a few mm of paint surrounding the treated area anyway. I've got a touch up kit from the fiat dealership so I may well just paint over the treated metal and T-cut over the area when it's dried.

Sorry if it seems i'm being excessively paranoid over a tiny bit of rust (though not enough to take it to a Bodyshop, i've spent enough on it already!) but this car really is in otherwise almost perfect nick, I fell in love with it first time I drove it and I'm determined to look after it properly.
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Old 24-08-2007   #6
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Re: Surface rust removal

wait 7 days after painting before using T-cut on the new paint, or it will make the paint go cloudy and give a white ish mist on the new paint,
after 7 days the paint will be alright to T-cut,

I made this mistake with an old renault 5 I had years ago, and ended up with cloudy white ish marks on the touched up areas
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Old 24-08-2007   #7
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Re: Surface rust removal

dont even use tcut its for bringing up faded paint and is old hat! use 2000 wet and dry then use g3 Ant
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Old 24-08-2007   #8
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Re: Surface rust removal

I presume the G3's for the discoloured/damaged paintwork? How do I apply that safely considering it's a small area, will a polishing cloth do?
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Old 27-08-2007   #9
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Re: Surface rust removal

G3 is an abbrasive polish like t-cut. Get a little photo up if you can.
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Old 30-08-2007   #10
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Re: Surface rust removal

Quote Originally Posted by jamieELX View Post
wait 7 days after painting before using T-cut on the new paint, or it will make the paint go cloudy and give a white ish mist on the new paint,
after 7 days the paint will be alright to T-cut,

I made this mistake with an old renault 5 I had years ago, and ended up with cloudy white ish marks on the touched up areas
the cloudy marks is called "blossem" it is caused due to damp or chill in the air nothing to do with t-cut but yes t-cut is amiture material
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Old 30-08-2007   #11
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Re: Surface rust removal

T cut has ammonia in it, which you find out if you have any little cuts on your hands and it gets in them, the cloudy finish on paint is caused by damp or cold conditions is called BLOOM and you can buy antibloom thinners to combat it for home or diy use Ant!
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