Model Master Acryl paints peeling off

I wished I had seen this earlier. Acryl over unprimed plastic will peel off unless a solvent primer is used. I hate this acryl  paint and glad I have only 3 bottles. I don't like how it sprays and the adhesion quality is zero.

Tamiya and Mr. Color are fantastic paints specially when Mr. Color Leveling Thinner is used. 

I finished my experiment of Vallejo Model Air, Model Master Acryl and Tamiya Acrylic on in-primed and Primed ( with Vallejo Primer) cleaned plastic. After a week of drying I stuck Tamiya masking tape on it and burnished it well. For the unprimed paint the Model Master Acryl peeled off. For the primed paint they were all fine BUT the Vallejo primer with no paint on top peeled right off. So if you use Model Master Acryl you have to prime. If you use Vallejo primer make sure it's a base coat and not a top coat. I think I will stop buying MM Acryl even though they are not being made anymore and invest in more of Tamiya and Mr. Hobby paints. For the primer I might stick with Tamiya and Mr. Hobby too. 

JimLo

Thanks. I noticed on my new bottles after wiping the bottle lip clean from paint and closing the lid tightly when I re-open It the bottle lip always has a lot of paint on it from my shaking the bottle. I don't think the lid closes tight enough on the jar to keep the paint from drying out. 

 

Any jar of paint,you want to be stirring,not shaking to help avoid that problem.

Thanks. I noticed on my new bottles after wiping the bottle lip clean from paint and closing the lid tightly when I re-open It the bottle lip always has a lot of paint on it from my shaking the bottle. I don't think the lid closes tight enough on the jar to keep the paint from drying out. 

jeffpez

I always have the same problem with the MM acrylics. I always prime before using them but have never been able to tape over them without some lifting. For that reason I stopped using them whenever masking is required. Once the bottle is opened they frequently start to dry up within a few months which is another reason I now avoid them.

 

I always have the same problem with the MM acrylics. I always prime before using them but have never been able to tape over them without some lifting. For that reason I stopped using them whenever masking is required. Once the bottle is opened they frequently start to dry up within a few months which is another reason I now avoid them.

Its about the primer. MM acrylics aren't Tamiya neither is Vallejo,they need good primer.Tamiya Etra Fine,or Mr Surfacer,never tried the Badger stuff,heard good things though.

Not lucky,Tamiya not true acrylic more if a hybrid,has very good adhesion compared to those others,especially when thinned with LT

Badger Stynylrez primer, always, or even just Tamiya as a primer or an automotive lacquer primer.

I've always found Vallejo and especially Hataka very twitchy.

I've been priming with MM grey laquer primer, scuff prior and after with a grey scotchbrite.  No peeling for me yet.

The scotchbrite is available at most auto parts stores, or can usually beg one from a local body shop.

When you do your testing, just make sure to rip the tape off quickly.  If it can handle a test like that without peeling, then you've found a good technique.  

Also I'm conducting an experiment with Vallejo Model Color, Model Master Acryl and Tamiya Acrylic paints primer and not primed on plastic. I'll let it dry for a week and will do a Tamiya masking tape test on them. I'll let you know the results. 

Thanks. 
I guess I've been spoiled or lucky with Tamiya Acrylics. I've never had to prime for Tamiya paints on any of my model surfaces.  Thanks again. 

I agree with the above. Acrylics on plastic are touchy. 

Lately I've been using the Badger Stynylrez primer and I really like it. Long term results TBD.

Bill

I always prime with acrylics.  Normally use the Model Master Acrylic primer but have also used the Tamiya grey and white spray can primers.  Acrylics seemed to be more sensative to me.

  Look online for fingernail polish mixer or tatoo ink mixer.  Small battery powered mixed with plastic tips that you can link together to mix the Vallejo paints.  Just use a pair of pliers to pull the top off and mix away-but keep the mixer ends submerged or you can create a mess with spinninp paint droplets!