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A Couple of Questions

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  • Member since
    May 2012
  • From: Pennsylvania
A Couple of Questions
Posted by pilotjohn on Wednesday, August 1, 2012 7:12 PM

I just ordered some liquid mask for use on canopies, and an issue I had with peeling paint using tape is making ask:

Q:  Is the "tack" that the liquid mask generates too strong to use along a painted edge?  My acryl is peeling and I am just wondering if this would be an option.

I also picked up some MM acryls.  One bottle (burnt sienna), and the other is RLM 79 (Desert sand).  One bottle was purchased at a hobby store locally and the other was mail ordered.  Both bottles seem to have very little liquid in them.  The other MM acryls that I have give an audible liquid noise when you jostle them, but these are quiet.  I opened the bottles and found the paint to be like jello.

Q:  Can I just experiment with some acryl thinner to get the colors "back" to the right consistency?  I will be airbrushing them only.  Seems somewhat fishy that they are both brown based.  Both bottles seemed to have a good seal and required a decent torque to open.

Thanks!

John

  • Member since
    August 2005
  • From: Sydney, Australia
Posted by Phil_H on Wednesday, August 1, 2012 7:41 PM

1: Generally, you will find that most masking fluids, when dry, have much lower tack than masking tapes. This becomes a problem when trying to make sharp demarcations like canopy frames. I find that the common masking fluids won't hold strongly enough for you to trim along frames without the mask pulling up from the areas you want to remain masked. Note also that certain masking fluids, eg. Humbrol Maskol and Gunze's Mr Masking Sol Neo, can be unfriendly to acrylic paints due to the solvents involved. They can and will eat through acrylic paints (and Future) if applied too heavily.

2: If your acrylic paint has started to turn to a gel-like state, it is likely to be beyond recovery. You could try, but if you add thinner and stir, if there are still lumps and/or strings after 5 minutes of stirring, toss the paint.

  • Member since
    October 2007
  • From: Scotland
Posted by Milairjunkie on Wednesday, August 1, 2012 8:14 PM

Phil_H

This becomes a problem when trying to make sharp demarcations like canopy frames. I find that the common masking fluids won't hold strongly enough for you to trim along frames without the mask pulling up from the areas you want to remain masked.

Ditto

I've never had much success with masking fluid, like Phil_H says it's not easy to trim a clean edge onto & if you don't cut a clean edge it generally doesn't come away nicely. I've tried & tried with the stuff & much as it seemed like the answer to my prayers, in reality it wasn't - although it is good for filling in larger areas..

I use Tamiya acrylics both with & without primer & I've never had an issue with Tamiya tape lifting paint. I don't know what brand of tape you tried, but it's possible that the adhesive was too strong to start with - this can be helped by sticking it to the palm of your hand to "de-tack" it slightly.

It's also possible that surface contamination prevented the paint getting a proper hold to the surface below.

  • Member since
    August 2007
  • From: back country of SO-CAL, at the birth place of Naval Aviation
Posted by DUSTER on Friday, August 3, 2012 1:32 AM

pilotjohn

 

I also picked up some MM acryls.  One bottle (burnt sienna), and the other is RLM 79 (Desert sand).  One bottle was purchased at a hobby store locally and the other was mail ordered.  Both bottles seem to have very little liquid in them.  The other MM acryls that I have give an audible liquid noise when you jostle them, but these are quiet.  I opened the bottles and found the paint to be like jello.

Q:  Can I just experiment with some acryl thinner to get the colors "back" to the right consistency?  I will be airbrushing them only.  Seems somewhat fishy that they are both brown based.  Both bottles seemed to have a good seal and required a decent torque to open.

Thanks!

John

 

I'd try to take/send them back. you got old stock.

Trying to reconstitute them is, as said above, Problematic. once the acril starts to gel its all over but the shouting-usually.

Good luck

Steve

Building the perfect model---just not quite yet  Confused

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