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Color sand and buff question
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keary_lewis0303
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PostPosted: Mon Jun 11, 2018 4:37 am    Post subject: Color sand and buff question Reply with quote

My car has fresh paint but I need to do some color sanding and buffing to remove some dirt and runs. I understand the concept in how to do it but I'm afraid to burn through the difficult areas. So I want to leave those areas alone. So my question is if I sand the center main areas will you see a a difference or will it kind of blend in. An example below of the area in yellow that I would leave alone. Or can I hand buff these areas lightly and tape off the edges and valley's to avoid any burns.




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67 Sunroof
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PostPosted: Mon Jun 11, 2018 5:56 am    Post subject: Re: Color sand and buff question Reply with quote

I would leave it alone and have my painter do it. Too much of a risk in my opinion!
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74 Thing
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PostPosted: Mon Jun 11, 2018 6:15 am    Post subject: Re: Color sand and buff question Reply with quote

Go to a detailing specific website like autogeek.net and go to the forum there and see the various color sanding products and how to's. Be careful of ridges and edges where paint is the thinnest and you can burn through more easily.
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Zundfolge1432 Premium Member
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PostPosted: Mon Jun 11, 2018 6:26 am    Post subject: Re: Color sand and buff question Reply with quote

If you were to look at paint and body forum here and more specifically the stickies above that there is an excellent thread on how to do it yourself. At the very least read it and decide if you are up to the task. It’s not something mysterious requiring an expert to perform. It’s more common sense and proper technique. Good luck 👍🏽
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Spezialist
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PostPosted: Mon Jun 11, 2018 7:00 am    Post subject: Re: Color sand and buff question Reply with quote

Is easier to sand off runs and respray that area. The result will be better.
35 year veteran auto restoration expert.
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theastronaut
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PostPosted: Mon Jun 11, 2018 9:52 am    Post subject: Re: Color sand and buff question Reply with quote

Use a sharpie marker to color over the areas you want to wetsand. This will act as a guide coat so you can see how much you're sanding off, and know when to *stop* sanding when the guide coat is gone so you don't go too far. You can sand any shape this way without fear of sanding through. I do body lines and weird shapes all the time using this method. You'll want to use 1000 grit on block made from 1/16" plexiglass to block the run flat. The thin plexiglass will curve to match the surface but is hard enough to cut the top of the run down. A soft block will cause you to sand through easier without leveling the run. You can also mask out around the run so you're only sanding the run. Once the run is flat color the sanded area with more sharpie marker guide coat and sand with 2500 grit before buffing.


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You'll also want to shave down the runs with a razor blade before sanding. You can buy run shaving files, but a razor blade works better. Wrap the very ends of a razor blade with 2-3 layers of tape to space the blade up off the flat part of the paint so you're only shaving down the run.

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Here a a few "difficult" areas I've wetsanded and buffed with no burn through. One of my pet peeves is body lines or "difficult areas" that people don't wetsand and buff, so you end up with some areas of the paint job that still have orange peel.

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'64 Beetle Sunroof OG Bahama Blue
'63 Beetle Vert
'66 Beetle
'88 Festiva L
'89 Festiva L
'64 Chevy C10
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67 Sunroof
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PostPosted: Mon Jun 11, 2018 3:23 pm    Post subject: Re: Color sand and buff question Reply with quote

Man I just wanna eat it like an M&M!
Wow!!!!!
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Spezialist
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PostPosted: Mon Jun 11, 2018 4:34 pm    Post subject: Re: Color sand and buff question Reply with quote

theastronaut wrote:
Use a sharpie marker to color over the areas you want to wetsand. This will act as a guide coat so you can see how much you're sanding off, and know when to *stop* sanding when the guide coat is gone so you don't go too far. You can sand any shape this way without fear of sanding through. I do body lines and weird shapes all the time using this method. You'll want to use 1000 grit on block made from 1/16" plexiglass to block the run flat. The thin plexiglass will curve to match the surface but is hard enough to cut the top of the run down. A soft block will cause you to sand through easier without leveling the run. You can also mask out around the run so you're only sanding the run. Once the run is flat color the sanded area with more sharpie marker guide coat and sand with 2500 grit before buffing.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.




You'll also want to shave down the runs with a razor blade before sanding. You can buy run shaving files, but a razor blade works better. Wrap the very ends of a razor blade with 2-3 layers of tape to space the blade up off the flat part of the paint so you're only shaving down the run.

Image may have been reduced in size. Click image to view fullscreen.



Here a a few "difficult" areas I've wetsanded and buffed with no burn through. One of my pet peeves is body lines or "difficult areas" that people don't wetsand and buff, so you end up with some areas of the paint job that still have orange peel.

Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Just where did you come up with the sharpie idea?

Oh and since you pine to see my work, here’s a 1st place winner GTO. No cut no buff. Right out of the gun. And look at the date. That’s my old notchback in the natural mirror.
Image may have been reduced in size. Click image to view fullscreen.

I can post a picture of the trophy too if you need it.

Here’s another
No buffing there’s more in my favorites of the same bus.
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Zundfolge1432 Premium Member
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PostPosted: Mon Jun 11, 2018 5:52 pm    Post subject: Re: Color sand and buff question Reply with quote

Question.... is this single stage paint ?
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theastronaut
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PostPosted: Mon Jun 11, 2018 6:15 pm    Post subject: Re: Color sand and buff question Reply with quote

Those look great for no buffing, what paint were you using?

I cut/buff everything. Even after switching to thinner clear (non-high solids) I'm getting less orange peel, but still get the "urethane wave" that seems to be inevitable with urethane clear. Blocking the clear gets rid of that.
_________________
Strive for perfection in everything. Take the best that exist and make it better. If it doesn't exist, create it. Accept nothing nearly right or good enough."
-Sir Henry Royce, co-founder of Rolls-Royce

'64 Beetle Sunroof OG Bahama Blue
'63 Beetle Vert
'66 Beetle
'88 Festiva L
'89 Festiva L
'64 Chevy C10
'66 Chevy C10
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keary_lewis0303
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PostPosted: Sun Jun 17, 2018 9:22 pm    Post subject: Re: Color sand and buff question Reply with quote

theastronaut wrote:
Use a sharpie marker to color over the areas you want to wetsand. This will act as a guide coat so you can see how much you're sanding off, and know when to *stop* sanding when the guide coat is gone so you don't go too far. You can sand any shape this way without fear of sanding through. I do body lines and weird shapes all the time using this method. You'll want to use 1000 grit on block made from 1/16" plexiglass to block the run flat. The thin plexiglass will curve to match the surface but is hard enough to cut the top of the run down. A soft block will cause you to sand through easier without leveling the run. You can also mask out around the run so you're only sanding the run. Once the run is flat color the sanded area with more sharpie marker guide coat and sand with 2500 grit before buffing.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.




You'll also want to shave down the runs with a razor blade before sanding. You can buy run shaving files, but a razor blade works better. Wrap the very ends of a razor blade with 2-3 layers of tape to space the blade up off the flat part of the paint so you're only shaving down the run.

Image may have been reduced in size. Click image to view fullscreen.



Here a a few "difficult" areas I've wetsanded and buffed with no burn through. One of my pet peeves is body lines or "difficult areas" that people don't wetsand and buff, so you end up with some areas of the paint job that still have orange peel.

Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Image may have been reduced in size. Click image to view fullscreen.


Ok its on it's way to South Carolina Wink
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