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Why is my Acrylic paint scratching off?
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United States
Member Since: January 26, 2007
entire network: 270 Posts
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Posted: Monday, April 02, 2007 - 11:40 PM UTC
Why is my Acrylic paint (Delta Creamcoat) scratching off? The surface I am applying it to is cardboard saturated with wood glue. I have gotten it to work before. Am I Thinning it to much? Not mixed well enough? To old?
Any ideas?
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Indiana, United States
Member Since: July 19, 2003
entire network: 1,055 Posts
KitMaker Network: 428 Posts
Posted: Tuesday, April 03, 2007 - 12:56 AM UTC
How old is your paint? Also, it might not be mixed well enough. I work in acrylics almost exclusively, and I use Model Master, which has never done that for me. Oh, and what kind of conditions is your paint/cardboard in?
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Kuala Lumpur, Malaysia
Member Since: March 05, 2004
entire network: 1,735 Posts
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Posted: Wednesday, April 04, 2007 - 07:49 AM UTC
It may be that the cardboard backing with wood glue didn't provide enough 'grip' for the acrylic or that wood glue may have some oil-like properties to which the water-based acrylic doesn't adhere too.

I reckon there's proabably 2 ways to go about it. The best would be to prime the cardboard with an acrylic based primer or try and apply several thicker coats of acrylic paint. I'd would probably try the first option as it would be easier.
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Virginia, United States
Member Since: May 06, 2003
entire network: 55 Posts
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Posted: Wednesday, April 04, 2007 - 08:07 AM UTC
Too much thinner (if you are not using thinner then too much water.) If you are airbrushing, your pressure is too high and the paint is drying before it hits the surface. If there is too much glue in the cardbaoard you are basically setting up a resist and the thre is no true adheasion going on. I agree- prime it to give some bite. Lower the thinner to paint ratio a bit and give it a go.