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  1. #1
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    Removing deep scratches for paint prep

    Hi all,

    While striping paint off my MG Hyaku Shiki 2.0, I got impatient, and used a file to scrape large bits of paint off the parts (backpack and chest armor).

    Now I am left with rather deep gouges in the plastic and after trying (admittedly half halfheartedly) to sand it out, I am left stumped. Does anyone have any suggestions on how to either sand out or fill in these gouges? Could I use Tamiya Putty? I bought some of that, plus some Mr. Surfacer 500, as it said it was for deeper marks.

    Its really important I get a smooth surface as i will be painting this with chrome then Alclad Hot metal, and am afraid that any scratches will show through.

    Thanks!

  2. #2
    I personally use tamiya putty and thin it

    Sent from my LGL22C using Tapatalk

  3. #3
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    Re: Removing deep scratches for paint prep

    Use tamiya putty ant thin it with paint thinner. Or you can mix one tube of tamiya putty an a new jar of Mr color surfacer to creat a thinned putty. Let the putty dry then sand it and lightly prime it with white primer if you have any. Sand the primer off and if there is any scratches left or low spots there will be white primer left. Repeat the process until the scratches are gone.

  4. #4
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    Re: Removing deep scratches for paint prep

    Quote Originally Posted by Rxslinger View Post
    Use tamiya putty ant thin it with paint thinner. Or you can mix one tube of tamiya putty an a new jar of Mr color surfacer to creat a thinned putty. Let the putty dry then sand it and lightly prime it with white primer if you have any. Sand the primer off and if there is any scratches left or low spots there will be white primer left. Repeat the process until the scratches are gone.
    Thanks for the tip! Question on that: Why sand off all the primer? Wouldn't I want the primer to level everything out with the putty filling in the gouges? What am I missing here?

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    Re: Removing deep scratches for paint prep

    Yes you should be able to use those products. Like Daltron I use tamiya putty, but I also use Bondo. I get the glazing bondo, it is red and will not hurt the plastic. Also if you put too much on or you want to take it off the bondo will come off or smooth out with water. I like it because it goes on nice and smooth and feathers out really nicely



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  6. #6
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    Re: Removing deep scratches for paint prep

    Quote Originally Posted by Flyboy3394 View Post
    Thanks for the tip! Question on that: Why sand off all the primer? Wouldn't I want the primer to level everything out with the putty filling in the gouges? What am I missing here?
    If you put a light coat of primer over the area you are repairing. Then sand the primer down it will reveal if there is still a low spot in the area you filled. If there's no primer left after sanding the you removed the scratches if there's primer left then you need to add a little more putty.

    By sanding the primer down any primer left will help show any defects and it will help fill them. Plus once you spary you final coat of primer before you spray you paint you should wet sand the primer 1600-2000 grit sandpaper paper. This will give you a smooth surface for your paint to adhere to giving you a nicer finish from your paint especially if it's a gloss paint.

    Like monkey said you can use bondo glazing putty and is a great investment. It's cheap and effective. I like to use it on large areas.

  7. #7
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    Re: Removing deep scratches for paint prep

    Another way to use the putty. I thin it with glue, the really thinned out kind. Then I can put on thin coat of the putty and it actually melts the plastic a little bit and fills in gaps and becomes "part" of the piece.



    List of things to do today. 1. Get a sword. 2. Name it Kindness. 3 Kill people with Kindness.

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  8. #8
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    Re: Removing deep scratches for paint prep

    Quote Originally Posted by gundammonkey View Post
    Another way to use the putty. I thin it with glue, the really thinned out kind. Then I can put on thin coat of the putty and it actually melts the plastic a little bit and fills in gaps and becomes "part" of the piece.
    If I can somehow manage to not muck that up, it will probably fix my issues perfectly. Can I just send the parts to you and you can do it for me? Will trade labor for beer/gunpla. haha

  9. #9
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    This is the glue I use.



    I add enough to soften up the putty, but it still has a "lose putty" feel to it. You can make it thinner. At one point I had a small batch made up so thinned that I could use a brush and "paint" the putty on.



    This is an end result





    I still have a tiny bit of clean up to do on the edges but that seam has been welded together. To put the putty on I use a few metal sculpting tools (mainly the bottom 2)



    Then for small seams and little fixes this is the bondo that we use.






    Sent from my iPhone using Tapatalk



    List of things to do today. 1. Get a sword. 2. Name it Kindness. 3 Kill people with Kindness.

    My WIP: http://www.gundamforums.com/showthre...816#post274816

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  10. #10
    I've never thought about making a big batch I normally make as needed. good idea!

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  11. #11
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    Re: Removing deep scratches for paint prep

    Quote Originally Posted by Daltrons-counter-attack View Post
    I've never thought about making a big batch I normally make as needed. good idea!

    Sent from my LGL22C using Tapatalk
    Thanks, Just make sure that the jar has a good seal on it. the stuff will slowly start to dry out. Granted this batch I have made up I have had for about 8 or 9 months and it is still good to go. I think I added a bit more glue a few months ago just to thin it out a bit more for when I was filling part of the Yamato, but other than that it stays fluid for a very long time in that jar.

    - - - Updated - - -

    Quote Originally Posted by Flyboy3394 View Post
    If I can somehow manage to not muck that up, it will probably fix my issues perfectly. Can I just send the parts to you and you can do it for me? Will trade labor for beer/gunpla. haha
    You will be fine. LOL No need to send it out. Here is what you can do to help make sure you get a good smooth part. Get a sacrificial model and put a few scratches in it and test out different ways of using the putty, glue, bondo, whatever. It is fine to mess up on a test model before you even start on the actual part you are trying to save. That is one reason I never throw out an old model, they make for great test parts.



    List of things to do today. 1. Get a sword. 2. Name it Kindness. 3 Kill people with Kindness.

    My WIP: http://www.gundamforums.com/showthre...816#post274816

    My built stuff:http://www.gundamforums.com/showthre...eys-Big-Garage

    My Blog postings. https://gundammonkeysgarage.wordpress.com/


 

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