Possible top coat issue?

[N2ae86]

Bit of an odd one here – just trying to understand what’s happened so I can learn from my mistakes.

I sprayed a panel grey and started to colour sand it to remove the peel. Thing is the panel has dried darker then what it should be an as I colour sand It reveals the correct colour.

I have painted a boot lid in the same gray and didn’t have the same issues when colour sanding.

I have noticed that on the final top coat the thin mix of paint versus thinners causes the mix to separate if left for a few minutes. Could this be why I have a slightly darker shade on this panel?

On recollection I mixed up the final gloss coat straight after doing the last colour coat and then stepped away for 10 mins came back and then sprayed, gave the gun a bit of a shake to mix up the contents and went for it.

Could it be that in those 10 mins the paint started to separate out, and the shake I gave the gun didn’t really mix the contents up very well – hence the slightly darker shade which sands off to reveal the proper colour?


Cheers

James

 

[piman]

Hello James,

"causes the mix to separate if left for a few minutes."

that shouldn't happen, have you the right thinners for the paint you are using?

Alec

 

[N2ae86]

Hi Piman,

I have been using Anti bloom cellulose thinners and the paint is also cellulose. Its quite strange I painted some other panels up with the same paint and they have come out the correct colour?

The first time I noticed this I went to spray a panel and the gun honked out clumps of black pigment onto the panel - when I looked into the pot it appeared that the paint had sperated out in the high concentration of thinners.

I thought I had got some crud in the cup by mistake and mixed up a new batch and that was fine - but it does seem if the weak paint mix is left for a period it settles and seperates out?

 

[the snooper]

how old was the paint ? had you already had it a while
did you thoroughly mix the paint in the tin ?

 

[N2ae86]

Paint is only a few weeks old, stirred it like crazy as well - Guessing I did something at some point as it seems to be a 1 off occurance.

 

[jaykay]

if it's a metallic paint, it will drop out if left.
put a few clean nuts in the pot,shake it about and they mix it up from the bottom.

 

[jaykay]

that is metal nuts,not hazelnuts.lol