Paint question. Help please.
 

I have decided to fix a few of the blemishes I have in my right rear quarter. With that, I am going to reclear the whole quarter instead of spotting it here and there. What do I need to do to the existing clear that is on the quarter. I am thinking I just need to rough up with 600 and respray the clear. Is that correct?

One other question, since I haven’t painted the doors yet and just know they are not going to match the other panels, any ideas what I should do? The paint is from the same gallon I did the rest of the car with.

The worst advice I got on this whole project was to leave the doors off when painting. I stupidly save the door sills to mess up the doors because I just know they are not going to match. Stupid, stupid. Not being a autobody guy I am basically screwed. All right, I vented. I'll move on.

Any suggestions,

David

David,

I would wet sand it with 1200 and then re-clear, 600 is too rough. You need to make sure you don't sand through the clear into the color coat. If you penetrate the color coat you'll have to re-apply color, or it will show.

Here's a link to a great autobody forum. There are several pro bodymen on that site that will offer great advice for the DIYer.

On the doors, is the paint a solid color or metalic? Solid colors will be easier to match. Make sure you shake the paint right before mixing. If you have a slight color variation you will have to sand the clear on adjacent panels and blend the color. This is done by fading the color onto the adjacent panel by spraying a full color coat close to the new panel varying to a light coat in the middle and no new color on the far end. Then you clear the panels. I have had good luck with solid colors from the same gallon as long as I shook the paint very well before each use.

I would check with the guys on the forum above for help with your specific products.

Good luck with the repair!

David, Are the blemishes in the clear or in the color?

If the paint is from the same gallon, Why won't the doors match?

If you shook the can before all paint mixing, prepped the same, mixed the same and sprayed the same, the doors should match just fine. What's the problem?

Mostly in the clear. I do have screw up in the paint due to some contamination where the paint bubbles that needs a bit of attention.

Regarding the matching, I was told that if the mix is not identical along with temperature, humidity changes and gun settings, the paint color could be different. I have used the gun since on other things so the gun might not be the same as before. Does everything have to be exact or just relatively close?

David

As long as you are not changing the color pigment mix it should match. The pigments will settle in the paint when it sits. You'll want to stir or shake it thoroughly before mixing a batch.

Humidity doesn't effect urethane like it does laquer. As long as you use the correct reducer for the temp you'll be fine. Gun settings won't change the color, but it might have an effect on how metal flake lays.

Is the paint solid color or metalic?

Flat (non mettalic). Well, I guess I will try and hope for the best.

David, it should match fine. Matching problems usually only occur when painting from a different can of paint or if you did not thoroughly mix the
same can each time you mixed a batch to spray.