Clear coat hazy and milky

M

matthewkpeter

Promoted Users
Hello, I was spraying clear coat coat on my car and it came out milky whitish color. This is my second time spraying base and clear in this area because the first time it happen the same. I made sure I sprayed at the correct 4 inches from panel. Clear hardner slow. Weather 86 with 15 humidity. Gun setting wide open. 2 open on fan. Gun iwata ws400 Evo 1.3 tip. Clear I was using high teck 7200. Any ideas on the issue. I know it's for sure from the clear because I seen it happen. It's on the top bed side
 

Attachments

  • 1C0562FC-A589-42CE-BD2F-1737F1DFA012.jpeg
    1C0562FC-A589-42CE-BD2F-1737F1DFA012.jpeg
    105.2 KB · Views: 253
  • D6AD4180-5D23-4032-9C37-124785E5DC1B.jpeg
    D6AD4180-5D23-4032-9C37-124785E5DC1B.jpeg
    58.8 KB · Views: 235
matthewkpeter said:
Hello, I was spraying clear coat coat on my car and it came out milky whitish color. This is my second time spraying base and clear in this area because the first time it happen the same. I made sure I sprayed at the correct 4 inches from panel. Clear hardner slow. Weather 86 with 15 humidity. Gun setting wide open. 2 open on fan. Gun iwata ws400 Evo 1.3 tip. Clear I was using high teck 7200. Any ideas on the issue. I know it's for sure from the clear because I seen it happen. It's on the top bed side
Click to expand...
I also have the harbor frieghts compressed dryer system right after my compressor and air filters after the dryer. I was spraying at 33psi. Do you think it could the clear coat brand I used?
 
Last edited:
100 different causes, but we need a few things to guess
First, exactly when did you notice this? 10 mins, 60 mins, next day.
Speed of reducer in base, speed of activator in the clear?
This will point us to more questions.

The clear your using is of low quailty, BUt that does not mean the clear caused the problem.
With accurate answers, we can pinpoint the problem.
 
Barry said:
100 different causes, but we need a few things to guess
First, exactly when did you notice this? 10 mins, 60 mins, next day.
Speed of reducer in base, speed of activator in the clear?
This will point us to more questions.

The clear your using is of low quailty, BUt that does not mean the clear caused the problem.
With accurate answers, we can pinpoint the problem.
Click to expand...
I noticed it the exact second I was spraying clear. Right when I stopped spraying mid panel because I was watching it happened I stopped. And it stopped exactly where i stopped. So I know its from clear. It happened right away. Waited 15m before laying my next coat. Speed of reducer in base slow
speed of reducer im clear slow. Waited 20ms After last coat of base before laying clear
 
#1: Regardless of the dryer system, have you checked for moisture in the air line? As a basic test, just put a plain air nozzle on the hose and blow it into the palm of your hand for 10 seconds. Don't use excessive pressure or you might hurt yourself. If you feel any moisture, that could be your problem.

#2: Is your hardener the same manufacturer as your clear? Sometimes you can get away with this condition, sometimes you can't, but Barry is the chemist, not me.

#3: If #1 and #2 are OK I'd shoot some SPI Universal Clear to see if the problem goes away. Considering the work involved, it's time to step up to a high quality product anyway. Others here will have other SPI clear favorites.
 
Last edited:
What base brand and what brand of reducer?
How long did base set before first coat of clear.

If you know it was the clear,why you asking?
 
Barry said:
What base brand and what brand of reducer?
How long did base set before first coat of clear.

If you know it was the clear,why you asking?
Click to expand...
I know it's happening on the clear coat stage. Don't know what's causing it. Will be switching brands and doing a spray panel to test. Base brand matrix. Than high teck for clear. Will be getting a sprare hood and spraying it to see what's happening
 
Reducer is critical, and the time frame between the base and clear.
Need an answer if you want help.
 
Barry said:
Reducer is critical, and the time frame between the base and clear.
Need an answer if you want help.
Click to expand...
The reducer I used was slow reducer for matrix. With 20ms from base to clear dry time. Degree outside was 86 degrees with the sun beating down on it
 
Strangely, that happened on the first coat, but that eliminated a lot of things.
I still have questions, but I won't bother you, and a few things come to mind.
1:quaility of reducer.
2: with temp and humidity base flashed too fast and trapped solvents.
3: moisture from the compressor.
Im leaning to base flashed too fast and clear pulled the solvents, and then because of the low solids dried too soon, and they are trapped in clear.

A simple test if you have a few coats of clear is to take a wool cutting pad buff a foot area, and it should burn them out.
Use a step one pad and ist cut compound.
If water from line heat will create a bubble down in clear and or a white spot.
This can also do it if the reducer has moisture in it.
 
blushing is typically too fast a reducer and humidity too high. flashes too fast making the clear cold and moisture condenses in the paint film. with that said though it could be something else because you typically wont get that on a hot panel. that is something you see on those cooler super high humidity days or a rainy day.
 
Yeah, the stated conditions don't jive with the result. The only time I ever had clear do anything like this is decades ago when I forgot that I left a freshly cleared hood outside, and the next morning it had dew all over it and had turned white. If buffed out, though.

The weird part is that it buffed out really flat. Looked like a lacquer job.
 
You must log in or register to reply here.
Back
Top