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Any concerns with premixing Mission Models additives?

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  • Member since
    February 2021
Any concerns with premixing Mission Models additives?
Posted by MJY65 on Tuesday, March 30, 2021 11:13 AM

I'm really settling in on MM paints as my preferred brand for airbrushing.  So far, I've been adding the thinner and poly separately to each batch just prior to spraying.  

Do any of you premix your poly/thinner 50/50 and just add that to the paint?  It seems like you'd get a more consistant mix that way rather than relying on individual drops.  Of course, I don't want to do that if it's going to cause premature aging of the products by not keeping them separated.

 

Thnaks,

Mike

  • Member since
    March 2003
  • From: Western North Carolina
Posted by Tojo72 on Tuesday, March 30, 2021 12:09 PM

I mix mine in the airbrush cup.The dropper bottles make it easy to measure out just what I need

  • Member since
    November 2008
  • From: Central Florida
Posted by plasticjunkie on Tuesday, March 30, 2021 9:29 PM

I have a few bottles and I mix in the ab cup too. I add 2-3 drops more of their thinner than what the instructions call for and find they spray better specially if you need the paint to be a bit translucent over a marble coat. Do use a good primer like Tamiya white or grey otherwise the paint will scratch ver easily.

 GIFMaker.org_jy_Ayj_O

 

 

Too many models to build, not enough time in a lifetime!!

  • Member since
    March 2003
  • From: Virginia
Posted by Wingman_kz on Tuesday, March 30, 2021 10:21 PM

It's been a few months since I've read them but go to their website and check the FAQ page. There may be something there about what you're asking. I bought a couple colors, clears, primer, poly and thinner to try but haven't done a lot with them. Haven't tried what you're asking but I've seen it mentioned somewhere. 

            

  • Member since
    November 2008
  • From: Central Florida
Posted by plasticjunkie on Tuesday, March 30, 2021 10:26 PM

The poly additive goes bad after a while so I wouldn't pre mix and store. My poly turned into jelly after over a year or so.

 GIFMaker.org_jy_Ayj_O

 

 

Too many models to build, not enough time in a lifetime!!

  • Member since
    February 2021
Posted by MJY65 on Wednesday, March 31, 2021 7:31 AM

Wingman_kz
It's been a few months since I've read them but go to their website and check the FAQ page. There may be something there about what you're asking.

Premixing isn't addressed on the website, so I sent them a message.  I'll post the reply here when I get one for all to see.

On a related note:  What the heck is up with the ratios they post?  Between their own website, instructions and literature, you can find anything from 10-30%.  I guess it probably isn't that critical.  I've been having good results with 10:3:3, but plan to play around with that a bit in both directions.

  • Member since
    March 2003
  • From: Virginia
Posted by Wingman_kz on Wednesday, March 31, 2021 2:01 PM

I hear you. I mixed up a little and shot it 2 days ago. I used about 30% poly and around 50% thinner. It sprayed well and dried fairly quick. Just now burnished down Tamiya tape and yanked it off, no lifting. I used their black primer, gloss sea blue and gloss clear. Each color I shot 2 or 3 light coats for coverage a few minutes between. Waited 30 minutes and shot the next color.   It was just a plastic spoon so I wasn't spraying for long but it shot great, no problem. For reference,  10 drops color, 3 drops poly, 5 drops thinner. Probably more thinner in the primer, I tried using from the bottle and it's too thin for that. I switched to a pipette. 

            

  • Member since
    February 2021
Posted by MJY65 on Wednesday, March 31, 2021 3:19 PM

Mission's response:

 

We do not recommend pre-mixing large batches.  Pre-mixing for long term storage could cause premature kick over or other inconsistencies. You can try it in smaller test batches but it is just as quick to mix as you go. 

  • Member since
    March 2003
  • From: Virginia
Posted by Wingman_kz on Wednesday, March 31, 2021 7:54 PM

That's what I expected. 

To each his own but I prefer mixing in a jar or cup and then transferring to the airbrush. I played around with these paints when I got them and a little more the other day. I don't think mix ratios are that critical. What you saw on the site kinda goes along with that. As long as you don't get it watery. Maybe measure some thinner to another bottle, add some poly and give it a try. Just don't expect a long shelf life. 

            

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