discussion ACRYLIC PAINT NOT STICKING

[Guest]

I airbrushed acrylic semigloss black onto the wheels of my fw190D last night. Mind you, I previously washed the plastic parts in a mixture of dishwashing liquid and water. The parts were thoroughly rinsed and dried. I applied a precut mask to the center of the wheel in preparation for airbrushing the tires. I wasn't happy with the placment so I carefully removed the mask disk and much to my chagrin some of the paint lifted from the part. Any suggestions as to why this is happening? Is this typical of acrylic paint? Can I airbrush clear lacquer oe enamel over the acrylic finish? would this help with the adhesion? Any suggestions would be greatly appreciated

 

[Dave W]

I have found that paint will come off like this if the surface it is applied to hasn't had a coat of primer first.Wether im painting doors and skirting boards in my house or a model aircraft,if I don't paint primer on first the top coat will come off when masking tape is stuck on then removed from it.And the surface to be painted must be degreased first.

 

[Guest]

Primer serves as an adhesion for the top coat giving it something to hold to. Some times even if you have washed down the surface to be painted top coats can and will lift if anything is attached to them or pulled from them. In some cases as what is a top coat dries it can also crack if proper preparation isn't done as in washing priming etc etc.

 

[Guest]

Tom a member of this fraternity taught me the art of preparation of small plastic bits (also bigger plastic bits).

I named it "Gritcolin". So you get a bag of birdgrit (do not leave yet it is genuine) and put it in a plastic container, which has a air proof lid, with your plastic bits. Then you shake and shake.

Remove well rinse in water and dry. The result is your plastic wheels etc.will have a dull finish which is perfect to receive paint.

I use Vallejo Model Air and you will not need a primer for these samll bits. The paint will stick and provide a perfect finish even with a single coat of black. Make sure the paint is cured 24 hours before handling to make sure.

Sounds nuts but it is a gritty solution and works. I use this for all small parts especially those you cannot sand paper as they are to small and or intricate.

Thanks Colin(CDW) just one of your imaginative ideas.

Laurie

 

[Guest]

Tom a member of this fraternity taught me the art of preparation of small plastic bits (also bigger plastic bits).I named it "Gritcolin". So you get a bag of birdgrit (do not leave yet it is genuine) and put it in a plastic container, which has a air proof lid, with your plastic bits. Then you shake and shake.

Remove well rinse in water and dry. The result is your plastic wheels etc.will have a dull finish which is perfect to receive paint.

I use Vallejo Model Air and you will not need a primer for these samll bits. The paint will stick and provide a perfect finish even with a single coat of black. Make sure the paint is cured 24 hours before handling to make sure.

Sounds nuts but it is a gritty solution and works. I use this for all small parts especially those you cannot sand paper as they are to small and or intricate.

Thanks Colin(CDW) just one of your imaginative ideas.

Laurie

That is a neat idea I will have to dabble with that myself Thanks Colin and Laurie