Oxidized Paint with Rock Chips - touch up or correct first?

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alloriginaltone

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Hello -

I have a 1986 Porsche 944 with oxidized paint on the hood and roof. It also has some stone chips. Obviously, this is a single stage paint. I measured thickness and I have enough paint all around for a correction. Was going to do Trizac 3000 and then 5000 color sand to cut the oxidized paint and then light cutting compound, polish and seal.

My main question is at what step in this process should I touchup/fill the rock chips on the hood?

Also, would you suggest both the 3000 and 5000 or just one and go to a cutting pad?
 
I'd skip the sanding all together... Absolutely no need. There are many other easier, yet effective, methods to remove oxidation.

The "Comet Cleanser" method, although I haven't done it in a long time, is one method that has worked well for me many times to remove oxidation. Follow that with the polishing of your choice.

Then there is the "Meg's #7" method to saturate the paint with nourishing oils, while removing the dead paint, prior to any other polishing.

Hard to make a definite recommendation without seeing the car but either of the two preceding methods are probably solid choices. I think I might do a hybrid of the two. First the Comet to remove the majority of the dead paint, followed by a #7 nourishment, and then compounding/polishing as required.

As for the touch-ups. You won't want to be doing any heavy polishing of the chip repairs until the touch-up paint has plenty of cure time. If you polish over the touch-ups too early it is very likely that you'll remove, some or all, of the touch-up paint from the chip. I'd wait a minimum of 30 days before any significant polishing of those areas.

For that reason I'd suggest doing the touch-ups after polishing, but before LSP.

A search should connect you with more than enough information on both the Comet Cleanser and the Meg's #7 methods mentioned above. Mike has articles/threads on both. Credit where credit is due... Mike gets all the credit for the Meg's #7 process. I'll take some of the credit for the Comet Cleanser method as I've done that one since the 1960s.
 
2black1s said:
I'd skip the sanding all together... Absolutely no need. There are many other easier, yet effective, methods to remove oxidation.

The "Comet Cleanser" method, although I haven't done it in a long time, is one method that has worked well for me many times to remove oxidation. Follow that with the polishing of your choice.

Then there is the "Meg's #7" method to saturate the paint with nourishing oils, while removing the dead paint, prior to any other polishing.

Hard to make a definite recommendation without seeing the car but either of the two preceding methods are probably solid choices. I think I might do a hybrid of the two. First the Comet to remove the majority of the dead paint, followed by a #7 nourishment, and then compounding/polishing as required.

As for the touch-ups. You won't want to be doing any heavy polishing of the chip repairs until the touch-up paint has plenty of cure time. If you polish over the touch-ups too early it is very likely that you'll remove, some or all, of the touch-up paint from the chip. I'd wait a minimum of 30 days for polishing those areas.

For that reason I'd suggest doing the touch-ups after polishing, but before LSP.

A search should connect you with more than enough information on both the Comet Cleanser and the Meg's #7 methods mentioned above. Mike has articles/threads on both. Credit where credit is due... Mike gets all the credit for the Meg's #7 process. I'll take some of the credit for the Comet Cleanser method as I've done that one since the 1960s.
Click to expand...

So interesting! I was using some softscrub the other day and thought...I wonder if this would work to cut that oxidization off. I dismissed it as a wacky idea since I am kind of a know-nothing compared to others.

But, with that said, can you tell me the technique using Comet? Do you sprinkle in an area, work it wet with a cloth and then rinse? I assume you don't work it dry. Do you suspend it in liquid and then put it on? Tell me a little more about how to approach it. If there's a link or Youtube that would be great. Thank you very much!!
 
alloriginaltone said:
So interesting! I was using some softscrub the other day and thought...I wonder if this would work to cut that oxidization off. I dismissed it as a wacky idea since I am kind of a know-nothing compared to others.

But, with that said, can you tell me the technique using Comet? Do you sprinkle in an area, work it wet with a cloth and then rinse? I assume you don't work it dry. Do you suspend it in liquid and then put it on? Tell me a little more about how to approach it. If there's a link or Youtube that would be great. Thank you very much!!
Click to expand...

Yes to the area I bolded. The only difference is I'd suggest a grout sponge as your working tool. The thick sponge distributes the pressure more evenly to the surface than a rag will.

Simply wet the car, sprinkle on the Comet quite liberally, and scrub away. Try a small area first to determine how much Comet to use, how much pressure, and how long to scrub.

If I run across any links I'll shoot them along.
 
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