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Thread: how to fix sand paper marks on clear coat

  1. #1
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    Default how to fix sand paper marks on clear coat

    So I did something stupid. I dry sanded parts of my car with 400 grit sand paper to remove some spots on the clearcoat and the result is the picture below. I tried to fix with compound but that didnt really do nothing so I am thinking about spraying some clear coat and blending it into the oem clearcoat, then perhaps compound and polish?

    Does this make sense? Is there any suggestions on how to fix this?

    I am new to DIY detailing and trying to learn on my older vehcile.

    Thanks


    IMG_20200713_210322.jpg

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    bump
    .
    .
    any help or feedback would be much appreciated

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    what car is this? And how mad will you be if you cause more permanent damage? Because, you really probably will.

    If you are having fun, and not too worried about it, and you just want to learn, then I suggest you start with a few hours of youtube before you spray or sand anything further.

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    Cringe
    ASPEN POTHOLES ARE OUT TO GET YOU

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    Did you do 1000, 2000, 5000 grit all wet sand and then compound it?

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    Quote Originally Posted by Twin_Cam_Turbo View Post
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    Did you do 1000, 2000, 5000 grit all wet sand and then compound it?
    This.

    Never ever dry sand. Wet sand with progressively finer, THEN polish.

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    Quote Originally Posted by Twin_Cam_Turbo View Post
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    Did you do 1000, 2000, 5000 grit all wet sand and then compound it?
    I did 1000 and 2000 grit wet sand before compounding but the result didn't have much of an impact.

    I am not sure if adding 5000 would achieve better results.



    Quote Originally Posted by ExtraSlow View Post
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    what car is this? And how mad will you be if you cause more permanent damage? Because, you really probably will.

    If you are having fun, and not too worried about it, and you just want to learn, then I suggest you start with a few hours of youtube before you spray or sand anything further.

    This is a 2010 Genesis Coupe. I wouldn't be too mad if I cause more damage because the end result would be taking it into a shop to do it properly but this is an older car that I am using to practice and learn.

    I haven't found any YouTube videos that really address this specific issue so any video references would be much appreciated!
    Last edited by gencoupe; 07-20-2020 at 11:28 PM.

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    Quote Originally Posted by gencoupe View Post
    This quote is hidden because you are ignoring this member. Show Quote
    I did 1000 and 2000 grit wet sand before compounding but the result didn't have much of an impact.

    I am not sure if adding 5000 would achieve better results.






    This is a 2010 Genesis Coupe. I wouldn't be too mad if I cause more damage because the end result would be taking it into a shop to do it properly but this is an older car that I am using to practice and learn.

    I haven't found any YouTube videos that really address this specific issue so any video references would be much appreciated!
    I don’t think many youtube videos would recommend sanding clearcoat with 400 grit unless you were looking to prep the car for a respray. That could be why you haven’t found any videos about this.

    Was sanding the car with 400 grit intentional or?
    I like neat cars.

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    Might be good to do the process of sand, filler, sand, primer, sand, paint, clean, clear coat.

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    400 grit wet sand is extremely aggressive, you would typically only use that to start the process of getting rid of orange peel or to prep a surface for paint or something. I can't think of a normal situation where you would want to drysand 400 grit, but I think you already know that haha.

    Honestly I'd just take it to somewhere like Screamin' Paintworks and get them to correct it for you properly unless you really want to have another go at it. If that is the end game anyway, stop now and it will be cheaper to fix. If you are just starting out you may not have the tools/compounds necessary to fix it properly and you don't want to make it worse. If you want to practice, grab a door or a hood from a wrecker and go nuts - it's very cheap (~$25 for a door, ~$50 for a hood) and you can quit damaging your car. I wouldn't suggest anyone experiment with aggressive correction methods for the first time on an actual vehicle.

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    Yikes....

    Just looking through some details on Hyundai's I have done in the past and most of them seem to have pretty thin clearcoats (sub 5 mils total depth avg). My guess is you're going to break into the colour coat pretty soon. Some perspective is that a factory clear on a good day might be as thick as a sheet of paper. Dry sanding at 400 then 1000+2000 is going to have you pretty much through the clear if you haven't already hit the colour coat in some spots. I don't know that this really could be fixed DIY with anything other than some sort of wipe on clearcoat like Optimum CCR (not an easy install). Most likely you will be looking at a respray.

    PS...use a block when you want to learn to wetsand a car. Those sanding marks are super inconsistent making them even harder to polish out.

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    I’m going to attempt to buff out and polish my car this weekend I’m a complete noob and never done it either, and some sections of my car looks just like yours. I stopped at Carzilla this afternoon and picked up a “beginner’s”kit. I will let you know how mine turns out, and if it goes well I wouldn’t mind helping you out.

    Edit: my first attempt, I’m going to try again sometime this week. Not the best I know, still learning though.
    DA1A1C14-7B1E-4FFB-AB11-F630A01B0349.jpg
    Last edited by Clever; 08-03-2020 at 08:44 PM.

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    Edit - Too early and misread

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    Welcome to the fourm there gencoupe.

    I'd have it repaired professionally and practice starting with a forgiving wax to start.
    Quote Originally Posted by Gestalt View Post
    Im the one with a learning disability....

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