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A Classic Fail

Posted: Mon Oct 21, 2013 4:35 am
by Tinman
Here is a Commer Pick-up I was restoring. I say "was" because now I have to start over again. When you look at the photo, you can clearly see the paint reaction where the white paint failed when applied over the red. Below, I'll describe exactly why it failed.

Image

It's a classic paint reaction and it's caused by applying the white paint outside of the time window for a recoat on the red paint. The recoat time is within 1 hour. After one hour has elapsed, you then have to wait 48 hours before you can apply another coat. I waited 24 hours so that I could safely mask the red paint ... big mistake!.

I included a paragraph about paint reactions in my tips about painting in the restoration hand book article. I mentioned this very important time window about recoating paint. Here's how I screwed up: I had recently switched brands of paint just to get this color of red. My old brand had really good paint but when the paint was tinted to this nice color of red, it had problems with blushing. When I switched brands, the new brand didn't suffer the blushing problems and I was pretty happy.

However, I was only using the new brand of paint for this one color of red. For nearly everything else I'm using my old brand of paint. I was in autopilot mode and recoated the model without thinking about the red paint being a different brand. My old paint could be recoated at the 24 hour mark, the new paint requires 48 hours and the failure was a classic rookie mistake: I failed to read the product instructions on the new brand of paint.

Re: A Classic Fail

Posted: Mon Oct 21, 2013 6:16 am
by Moyboy
Looks more like when acrylic reacts with enamel Joe. I've had it go like this spraying the acrylic over enamel but ok the other way.

Re: A Classic Fail

Posted: Mon Oct 21, 2013 6:29 am
by mrmoko
Tinman going for that antique look. lol . Read the can ya boof head :lol: I must add , lately I don't read the can because I can hardly see the writing . I swear the writing is getting smaller . Along with the fact my eyes are on the way out .

Re: A Classic Fail

Posted: Mon Oct 21, 2013 1:10 pm
by Tinman
Moyboy wrote:Looks more like when acrylic reacts with enamel Joe. I've had it go like this spraying the acrylic over enamel but ok the other way.
I have not used any acrylic hobby paints. I tried some acrylic about 10 years ago and disliked the product performance. I've stuck with solvent based paint ever since. I guess a day will come when the solvent based paints are no longer available and I will be forced to switch.

Re: A Classic Fail

Posted: Tue Oct 22, 2013 8:29 pm
by CrazyDave
I get this quite often, I attribute it to bad luck.
You could market your truck as "Alligator Trappers" vehicle.

Where is that ESSO Tanker?

Re: A Classic Fail

Posted: Wed Oct 23, 2013 4:02 am
by Tinman
CrazyDave wrote:
Where is that ESSO Tanker?
Coming soon, I have to work these things in between fishing, swimming and a bathroom remodel (in that order, much to the wife's dismay).

Re: A Classic Fail

Posted: Sat Jun 21, 2014 1:48 am
by choobox
Acrylic paints will never match the adhesion or performance of solvent based paints. Enviro-treehugger paranoia gives us few choices in the future.