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Old 05-06-2010, 02:19 PM
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Not enough clear coat?

First off, great site. I am a first time painter, and I found a lot of helpful information here.

Secondly, I just did my first paint job last night. I posted some pics below on another online forum, and one of the members (who is apparently an experienced painter) said that I didn't spray enough clear. I sprayed three wet coats per the instructions, but agree that in some parts it doesn't have the luster I would expect. His comments exactly were "You didnt spray enough of it. Plus you spayed it to thin and too far from the car. It looks like you dusted it rather then actually coat it."

Can anyone provide some feedback based on the pictures below? There are some higher quality versions on my Picasa page here:
http://picasaweb.google.com/nickt93/MiataPaintJob# (there is one without clear coat, but the others at the end are after the third coat of clear).

If I didn't spray enough clear last night, is it okay for me to spray another coat today (after I use a tack cloth to remove any contamination)?

Thanks in advance for the help!








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Old 05-06-2010, 02:33 PM
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No you wont be able to just spray more clear on it. You will have to sand and then reclear. Now, what clear did you use, reducers, air pressure, how far away, what paint gun, ect..... Your VERY FIRST coat of clear should be wet and shiny, and every coat after.
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Old 05-06-2010, 02:44 PM
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way to go!

Good job on your do it at home paint . I'm a future first timer. What color is that and are the fans blowing INTO the booth? Thanks
James
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Old 05-06-2010, 02:58 PM
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Thanks guys - here is some additional information:
  • Used High Teck Clear Coat and Medium Reducer
  • I sprayed at 25-30 psi at the gun inlet, which is supposed to be 10psi at the cap
  • The gun is a Devilbiss Starting Line HVLP
  • Sprayed from a distance of 8-10 inches
  • Each coat appeared wet as it was laid down

The color is from Porsche - it's called mint green. I've got two fans drawing air into the booth, and two fans as exhaust.

Why do I need to sand before adding another layer of clear? I figured that might be a good idea anyway to smooth out the surface before adding clear. As for the dust that will be created from sanding, i suppose I will need to wash the car once I'm finished sanding?
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Old 05-06-2010, 05:40 PM
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You have to sand it because the clear has cured. If you spray over it without sanding it WILL blow off when you wash it. The clear has to have a mechanical bond. And yes you are going to have to clean the car before you paint. Your problem though is you are going to have to be careful sanding. you might have to touch up some paint from sanding through.
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Old 05-06-2010, 10:03 PM
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If it has been more than 24 hours since you last clear coat then you must scuff the clear before adding another coat. It is not necessary to "sand" the clear, use a red Scotch Brite pad and just scuff it all over then clean real good with a wax & grease remover. Do not use any tack cloths as most people do not know how to use them properly.

The tack cloth is just drug over the surface will very little pressure, you never use a tack cloth like your trying to dry the surface with a towel.

Vince
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Old 05-07-2010, 06:37 AM
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Quote:
Originally Posted by 302 Z28
It is not necessary to "sand" the clear, use a red Scotch Brite pad and just scuff it all over then clean real good with a wax & grease remover.
Normally yeah, but in his case, I'm pretty sure the clear isn't smooth, so it NEEDS to be sanded. Any roughness from this first clear experience will only be transfered into the next one. You want the surface to be as smooth as possible to start.
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Old 05-07-2010, 06:39 AM
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Quote:
Originally Posted by Underground
Normally yeah, but in his case, I'm pretty sure the clear isn't smooth, so it NEEDS to be sanded. .
I don't see how you can determine that from the photos posted.

Vince
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Old 05-07-2010, 03:28 PM
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Quote:
Originally Posted by 302 Z28
I don't see how you can determine that from the photos posted.

Vince
I was also surprised when I posted this on another forum and one of the members noted that it doesn't look like there is enough clear coat, however I'm glad he did. After looking at the car up close, the parts with more clear coat (edges of panels that got overlapping strokes, the windshield frame and side view mirrors that I held the gun closer to) look a whole lot smoother. So, in light of the feedback from all of you, I am going to wet sand/ scotch brite the car this weekend and shoot two more coats of clear.

Thanks everyone for the feedback.
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