Recommend Cheap Thinner for Tamiya + Testors Acrylics?

water is cheap

MonsterZero

I want to buy like 1 gallon cheaply.

I don't want to buy from Tamiya because they sell small bottles expensively...

German Armour

For tamiya use isopropyl alcohol.

modelmaker66

water is cheap

I use Tamiya acrylics, and through trial and error, I came to the conclusion to bite the bullet and use their acrylic thinner, X-20A.  I buy it in the larger plastic bottle.

I started out like you; I followed my Dutchy senses, which made me want to spend as little as possible.  So at first, I tried using water.  I found that this didn't thin the paint properly, and that when applying it by hand, which I did for painting figures, the paint would clump on the brush and on the surface.  When it did manage to apply well enough, applying a second coat would often lift the first coat off.

Then I tried isopropyl, but with the same result.  Tamiya's paints and thinners are made with an alcohol, but it's not isopropyl.  By that time, I was also using it for airbrushing, and I found the same problem as with water-it didn't thin properly, leading to clumping.

So I broke down and bought the bottle of Tamiya's proprietary acrylic thinner.  And all of a sudden, the paint thinned and went on beautifully, whether applied by hand or with the airbrush.  And when applying by hand, I can put down coats as thin as if I had airbrushed them.

I can't speak for others' results, but that's how mine came out.

The one exception to using Tamiya's thinner is using lacquer thinner when airbrushing.  That also thins the paint properly, and it has the added effect that the matte paints are even flatter than when thinned with the Tamiya thinner.

And a little bit of thinner goes a long way.

As for Model Master acrylics, those I can thin with water or with isopropyl, and they go on just fine.

Notice that nowhere in this thread does anyone suggest good old hardware store spirit thinner. With reason.

I gave up on Testors acrylic a long time ago.

I don't much use Tamiya because they don't make any colors beyond the basics which are useful to me, but when I do I use tamiya thinner, or in a pinch lacquer thinner.

I use strictly Tamiya acrylics and I stick with their thinner. It lasts quite a while considering you only use a few drops at a time and gives great results. Good luck in your search.

Tamiya's acrylic thinner is essentially a mix of Isopropyl alcohol, water and some propylene glycol. What propportions though, I don't know.

As mentioned above, buy the 250ml jugs. It's still expensive, but much less so than buying the same amount in the small jars.

It's the finish that makes or breaks a model. When you spend upwards of $50.00 for a kit, it doesn't make sense to skimp on the paints/thinners and risk a bad result.

I like to keep things in perspective.  If I am building a $200 model, how much would I need to spend on the manufacturer's recommended thinner, for that particular model?  A nickel maybe? A dime total?

I'll always use the recommended thinner and avoid risks.

I use the Tamiya Lacquer Thinner.Alcohol dries it too quick for me,tip keeps clogging.Didnt like water either.

I don't use Modelmaster acrylics.But overall I get better results using manufacturer thinners.For me,no need to experiment.

Using 60ML total mix the following: 2/3 water, 1/3 99% Isopropyl,  1ml fluid retarder,  1ml flow improver.  I’ve used this for about 3 years now with Tamiya paints and it works just as well as their X-20 at a fraction of the cost.

Murphy's Law

Using 60ML total mix the following: 2/3 water, 1/3 99% Isopropyl,  1ml fluid retarder,  1ml flow improver.  I’ve used this for about 3 years now with Tamiya paints and it works just as well as their X-20 at a fraction of the cost.

 

70% Isopropyl alcohol.  50-50. Been doing that for years now.

GMorrison

 

 

Murphy's Law

Using 60ML total mix the following: 2/3 water, 1/3 99% Isopropyl,  1ml fluid retarder,  1ml flow improver.  I’ve used this for about 3 years now with Tamiya paints and it works just as well as their X-20 at a fraction of the cost.

 

 

 

 

I charge $120/hr as a professional, and my modeling time doesn't come free. If I spend about 100 hours on a model, which is the norm; I am NOT going to save $ 5 on the finish to veer from surefire results towrads an unknown.

 

 

Murphy's Law

Using 60ML total mix the following: 2/3 water, 1/3 99% Isopropyl,  1ml fluid retarder,  1ml flow improver.  I’ve used this for about 3 years now with Tamiya paints and it works just as well as their X-20 at a fraction of the cost.

 

FWIW an approximation of your thinner blend works great in MM acrylic too. Use less for brushing of course, very little goes a long way actually. And a bit more for air brushing. MM sprays smooth as silk with that actually.  MM needs very little thinner for brushing. I don't think MM needs the flow aid, the retarder is a must, especially for spraying.

oldermodelguy

 

 

Murphy's Law

Using 60ML total mix the following: 2/3 water, 1/3 99% Isopropyl,  1ml fluid retarder,  1ml flow improver.  I’ve used this for about 3 years now with Tamiya paints and it works just as well as their X-20 at a fraction of the cost.

 

 

 

 

FWIW an approximation of your thinner blend works great in MM acrylic too. Use less for brushing of course, very little goes a long way actually. And a bit more for air brushing. MM sprays smooth as silk with that actually.  MM needs very little thinner for brushing.

 

 

Murphy's Law

 

 

 

 

 

Good to know.. I rarely use MM and wasn’t sure if it was compatable or not. 

 

Yep works great, though I edited my last post to say I don't think it needs the flow aid but the retarder is a must. MM needs very little thinner unless doing a wash or something..

Edit: By the way it needs a good primer when going to plastic. I use Stynylrez.