[scott70]

Painted and clearcoated nose and looks good under the flourescent in the shop but outside at any angle it looks blotchy. Mint turquoise metallic. What causes that? He's redoing it. The full pic shot looks even but at the angle it's blotchy. Really noticed it outside.

[steve v]

It's called metallic mottling, a bing search has multiple hits & here's one of them.

https://www.bing.com/search?q=metall...RM=CHRDEF&sp=2
Text from above link:
Common Cause For Paint Mottling and How To Eliminate It. Mottling is where for the metallic gathers together in areas or bunches together and gives it uneven or blotchy look. This is usually caused by spraying the base coat too wet resulting in the metallic flakes moving around bunching together. Mottling can also happen spraying pearls.

From my experience, it was common in the old days of spraying single stage AE that if you sprayed it too wet or heavy the metallic in the paint could move around. There are different spray techniques to correct/prevent it, hopefully someone with bc/cc expertise will chime in. It may be a side affect from adding more metallic to your mix?

[Flynbye]

Most likely a coverage issue. You would see mottling under any light.

[scott70]

He painted the trunk only today seeing if he could get a more even look. Took it outside but the daylight was going away and really didnt get to see it in good daylight. He tried holding his gun up higher so as to mist the BC a little more. Looks good under flourescent but will try tomorrow in sun light. Also,,,since he hasnt gotten far as with the panel painting,,Im thinking about having the paint color tweaked. Its supposed to be mint turqouise ,,if you look at the sample piece i cut out of the original door jamb that has the factory paint. He painted the trunk and it looks really green. Its supposed to look blueish green. The trunk looks like no blue hue at all. a 70 buick had aqua mist, 70 chevy misty turquoise, 70 olds was reef turqouise and 70 caddy adriatic turquoise which were all the same exact color. So a local body shop guy who mixes his own paint looked up the code and mixed it. Its too green and I didnt know if there was a place to look where someone actually came up with a good formula to match the original color?

[400 4spd.]

I didn't see that this was getting replies when I replied to your other similar thread.
Is he painting all of the loose parts and body shell at different times, or was the trunk a "test" panel?

[scott70]

His garage is a little cramped for space ,,,,the fenders,hood,trunk lid,valances are all off the car. He painted/cleared the front and rear valance and the nose.Looked perfectly under the garage lights inside. We need some space so we moved the valances to the other garage and its when we took them outside thats we saw the blotchy look when looking at a slight angle instead of straight on. So it was decided today to just try the trunk lid with different technique. not putting it on as heavy and misting the final coats and going in different directions. Trunk lid looks ok but wont know til we get it outside in the light i guess. Did look up mottling and sounds similar to this. Many different opinions googling on how to eliminate mottling. Im not a painter so this is all new to me. I do realize that the light metallic is a hard paint to get perfect.
Also like i said Im not happy with the color either,,the paint is sherwin williams and the formula the paint guy found isnt correct IMO. So things are not going smooth at the moment. Ive been planning this paint job/body work since 1986 so my expectations may be a little high. Im not expecting perfection .

[steve v]

I'm guessing 400 4spd is thinking about the color mismatch potential when painting panels @ different times with a high metallic paint.
Your best bet is to paint it all at the same time and have the fenders/panels hanging the same way they are when mounted on the car.

[scott70]

the panels/fenders are hanging like they would on the car. He was planning on painting the whole car today but since the blotch issue i suggested just trying the trunk lid today instead of doing the whole car and having a big issue. The valances are down low so really wasnt thinking it would be a issue at doing them at different times.

[400 4spd.]

Steve V is on track with what I was thinking. I agree that shooting the lower valance panels first is worth the gamble if booth space is tight. Because the trunk lid is now painted (even if you shoot it again), you/he really needs to spray a test panel/spray out card that has varying degrees of gray so that you know how many coats will get the true color. I mention this because if it requires 5 coats to achieve "hiding" (meaning no sign of the different underlying shades), and the rest of the parts do not get 5 coats, the trunk lid may not match the rest of the car.

[scott70]

The sealer he put on before painting was tinted to the color of the paint. So he didn't put the base over grey primer. Would that help even things up? Next time around he will paint the whole car at the same time like he was intending to do. I'm going to the paint mixing guy today to see if he can tweak the color so he might end up repainting.. The nose and valances have got to get repainted anyways because of the blotchy.

[400 4spd.]

If the guy is a painter he will know how to handle it. He won't need (or want) advise from us.

[HWYSTR455]

I think it can happen if the paint is too thin, or it's too cold of weather too. Most shops let a car sit under the lights for a while and let it get up to temp before spraying. And when shooting metallic, usually be careful not to thin it too much.

Have to shake the gun along the way too, or use less in the gun, and refill more often.

Obviously, spraying too heavy is a problem too, but usually good paint guys know that.

EDIT: You want the paint to dry faster too.

.

[scott70]

Originally Posted by 400 4spd.

If the guy is a painter he will know how to handle it. He won't need (or want) advise from us.

This is more for me than him just learning myself.

[68 461 Bird]

Originally Posted by HWYSTR455

I think it can happen if the paint is too thin, or it's too cold of weather too. Most shops let a car sit under the lights for a while and let it get up to temp before spraying. And when shooting metallic, usually be careful not to thin it too much.

Have to shake the gun along the way too, or use less in the gun, and refill more often.

Obviously, spraying too heavy is a problem too, but usually good paint guys know that.

EDIT: You want the paint to dry faster too.

.

All good points you mention, but when I first began reading this thread, the shaking of the gun is what I was thinking too.

[scott70]

hes got it coming out good. With some different technique and more /better coverage. With it being a metallic paint and kind of light color its a hard paint to get right from what Im told.