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How to Paint Chipped Areas



 
 
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  #1  
Old June 13th 05, 04:15 AM
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Default How to Paint Chipped Areas

Hi - Does anybody know of some sites or instructions for reparing areas
of paint that have been chipped off from stones?

I have searched the internet and can't find anythnig satisfactory.
Typically the instructions are for fixing one chip (which doesn't exist
in the real world). I have areas of a few square inches that would not
look too good if painted with a toothpick!

The current paint is just a solid GM red.

I need to know some details about blending the area with the rest of
the paint. Most instructions fail to cover this, and just say things
like "spray the primer", "spray the topcoat", without saying how far to
go around the work area:

-How far do you go with the primer?
-How far do you do with the topcoat?
-What compounds/work do you do to the final surface to blend it?

Obviously, for such a small area, I want to use spray cans. I realize
that the result is not the best, but what can be done (sanding/compunds
etc) to give better results?

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  #3  
Old June 13th 05, 09:20 AM
Ted Mittelstaedt
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Default


> wrote in message
oups.com...
> Hi - Does anybody know of some sites or instructions for reparing areas
> of paint that have been chipped off from stones?
>
> I have searched the internet and can't find anythnig satisfactory.
> Typically the instructions are for fixing one chip (which doesn't exist
> in the real world). I have areas of a few square inches that would not
> look too good if painted with a toothpick!
>
> The current paint is just a solid GM red.
>
> I need to know some details about blending the area with the rest of
> the paint. Most instructions fail to cover this, and just say things
> like "spray the primer", "spray the topcoat", without saying how far to
> go around the work area:
>
> -How far do you go with the primer?
> -How far do you do with the topcoat?
> -What compounds/work do you do to the final surface to blend it?
>
> Obviously, for such a small area, I want to use spray cans. I realize
> that the result is not the best, but what can be done (sanding/compunds
> etc) to give better results?
>


You have to wet sand the whole area smooth with successive grits, until it
is perfectly smooth. Then you prime and paint. Generally you use 4-5
light coats rather than 1-2 heavy coats.

However it is a guarentee that with a rattle can you will not match the
paint color. And you cannot feather in from one color to another without
it showing.

And it is also a guarentee that unless you parctice beforehand you are going
to put too much paint on and it will sag and drip.

And also, the paint that comes out of a rattle can will not dry as hard as
the factory paint which was baked on. If this area is prone to chipping it
will chip again, and worse.

Ted


  #4  
Old June 13th 05, 02:49 PM
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Posts: n/a
Default



wrote:
> Hi - Does anybody know of some sites or instructions for reparing areas
> of paint that have been chipped off from stones?



Yes,
www.paintucation.com

Kevin sells a couple of how-to videos that I used to paint my vette,
and he and everyone else in the free forum will tell you everything you
ever wanted to know about painting.

  #5  
Old June 14th 05, 12:06 AM
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Default

Thanks for the help.

Yes, I don't expect the blend to be very good. I want to just keep
patching it each year to prevent rust. If I really want a good job
before I sell, I can have a pro fix the areas at that time.

I do need more details though.

It can't be as simple as "Then you prime and paint".

I assume you must:

1. Prep after the inital sanding.
2. Spary primer (how far?, bare metal only?)
3. Do you sand the primer now?
4. Prep for topcoat?
5. Spray topcoat (how far?)
6. Wet sand or some sort of grinding compound, etc, etc.

Perhaps the books are the way to go.

  #6  
Old June 14th 05, 09:29 AM
Ted Mittelstaedt
external usenet poster
 
Posts: n/a
Default


> wrote in message
oups.com...
> Thanks for the help.
>
> Yes, I don't expect the blend to be very good. I want to just keep
> patching it each year to prevent rust. If I really want a good job
> before I sell, I can have a pro fix the areas at that time.
>
> I do need more details though.
>
> It can't be as simple as "Then you prime and paint".
>
> I assume you must:
>
> 1. Prep after the inital sanding.
> 2. Spary primer (how far?, bare metal only?)
> 3. Do you sand the primer now?
> 4. Prep for topcoat?
> 5. Spray topcoat (how far?)
> 6. Wet sand or some sort of grinding compound, etc, etc.
>
> Perhaps the books are the way to go.
>


If you have paint chips I doubt they have gone all the way through. What is
most likely is the primer under the car paint is showing. You don't want to
sand all that off. All you want to do with sanding is to get the surface
leveled
then prime and paint. I was assuming your underlying paint layers are still
intact.

If the chips have, in fact, gone through the primer to the bare metal then
you have just bought a peck of trouble and you can't do what I was
describing because you undoubtedly have rust there. Instead you have to
strip all paint off and remove the rust (there are a variety of ways) then
sand prime and paint.

Ted


  #7  
Old June 15th 05, 02:01 AM
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Default

I really can't see any rust. The areas are leading edges of panels
that are constantly sandblasted by rocks. Each area is a couple square
inches, and I'm pretty sure it is bare metal.

It's just that "prime and paint" thing that people tend to "breeze
over". That's where I need details step by step instructions.

I'm sure that there is more than:

1. Spray on some primer
2. Spray on some paint

 




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