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Need help. Paint curdling.


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Bigg_Cody
New User

Apr 23, 2016, 1:41 PM

Post #1 of 6 (442 views)
Need help. Paint curdling. Sign In

He guys. I recently painted a project 80 z28. When unmask in a strip of the new paint decided to come up with the tape. I feathered the edge and finish sanded with 600 wet. Then when I tried to spray base back over it, it curdled (wrinkled) on the edges where I sanded through the clear.
Please help. Why did the my paint wrinkle?
What do I need to do so I can respray the door?
Thanks all.

Code
Mad 


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Apr 23, 2016, 2:41 PM

Post #2 of 6 (436 views)
Re: Need help. Paint curdling. Sign In

Not my trade but worked all with it all along. Lots to know about what's compatible with what with paint, clear coats - the whole game including how long it was dry and what primer(s) to use.


Ex: If you paint an enamel over a fresh lacquer it will react or the other way around - forget right now.


If a first coat of paint came up with tape it wasn't stuck too well was it? Prep will be everything - I know that much along with heated lights and not even micro dust in the air around,




T



Bigg_Cody
New User

Apr 23, 2016, 8:45 PM

Post #3 of 6 (427 views)
Re: Need help. Paint curdling. Sign In

Thanks for the reply.
I've been doing autobody and paint for quite a while as a hobby and still I come across things that stump me.
All the materials I used were compatable.
The primer surfacer, base and clear are all the same brand and made to work with each other.
But yet when I repaired my mess up and layed my next layer of base down (same as the first) it curdled where I sanded through the clear underneath.
Do I have to sand and put primer down again now before I put down more base and clear??
Thanks


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Apr 23, 2016, 11:11 PM

Post #4 of 6 (422 views)
Re: Need help. Paint curdling. Sign In

Site does NOT have a regular total auto body tech TMK which could help about now. My strongest part was restoring cars with some unknowns for paint already on it and let the pros make the final call if it will react or if it should be sanded down to bare metal and start all over.
Your term "curdling" I'm taking as a reaction that yields a wrinkling, fish eye spot of reaction or alligator skin look which I see much later after the whole thing is done.
When you said tape lifted paint now I just wonder what product didn't like what product under it or did it dry fully or what the heck happened?
Where are you acquiring materials? Been quite some time for me but like to deal with the Auto Body Supply places and consult with pro body techs depending on touch up myself or super high end finish where I'll just play some part of the prep usually to remove parts so less tape required like remove door handles, moldings and tape from inside before finish folks get it at all.
I lack the clean rooms with particle free air where car/vehicle would be finished with last coats with no flaws like the pimples for jobs where and have wanted results like the car wasn't redone at all but a result like an untouched original still in top shape.
Two restos the paint guy was so clever it was a better finish than the car would have had new but didn't look out of place as my requests have been to do entire car not a section which changes the game.
Said it's been a while and products once used no longer made or contained hazmats not allowed anymore so would still default to the techs who are dealing with assorted needs for exactly today products even if for older stuff.


Said it's not my specialty but still do some minor stuff mostly interior parts requiring dye on plastic or leather now. Ever disappointed with product quality. Angry with stuff that looks perfect right away that just months later without even being wet is showing age or flaws that weren't there day ONE!


Still caught up in how or why your tape lifted paint? Was it YOU or the product we might not know,


T



Bigg_Cody
New User

Apr 24, 2016, 10:12 AM

Post #5 of 6 (414 views)
Re: Need help. Paint curdling. Sign In

Yeah, curdling is just a term I use for paint wrinkling.
I did strip all trim parts I could on the car before spraying it so I'd have minimal masking. There was just that one trim piece that wouldn't come
Off so I masked it but I know exactly what happened. I left it dry too long and the paint kinda "bridged" the gap between itself and the door. I payed a lot of attention to My prep work, it was sanded well.
The only thing that's still the mystery to me is why it wrinkled.
Thank you very much for all the help. I appreciate it!
The paint is PPG, so I will go and talk to their paint rep and see what he says about what my next step might be.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Apr 24, 2016, 10:45 AM

Post #6 of 6 (411 views)
Re: Need help. Paint curdling. Sign In

Yes - do find the web site and possible live Q&A time to ask or plain phone call to paint maker's contact people. I couldn't guess what changes might be months old that caused a problem for you.


I believe you did things as right as possible and really don't know what went wrong? Maybe some time limits, temps, humidity played a factor. I just can't know so easily product by product,


T







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