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      louiej5


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      Post #76914, posted on 11-19-2020 GMT-5 hours    
      Hi there, I'm trying to strip my Skymarks Delta 747 of all its paint so I can repaint it in another livery. After soaking it in isopropyl alcohol for a day, I wiped off the Windows and doors easily, but there are still traces of them.

      The dark blue at the bottom of the fuselage was a lot harder to scrub off, and even if I get it loose with a brush, the blue spreads to the rest of the white fuselage. So what used to be white is now lightly stained with blue paint. I scrub even more, and rinse with water but these blue stains seemed to have "rehardened" all over the fuselage.

      1) How to I actually get rid of the blue paint instead of just getting it loose with IPA? Should I continue to try to rinse with water as I scrub?

      2) do I have to get this fuselage perfectly clean of old paint before I repaint it with primer? Or can I just ignore these stains?

      My model is resin. Thanks

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      Piedmont


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      Post #76916, posted on 11-19-2020 GMT-5 hours    
      Hi Louiej5

      I would not worry about the slight blue stain that you are seeing. I would give the model a good wash with soap and water, followed by a rinse to remove any traces of the soap. After letting the model dry thoroughly, I would give the model one or two coats of a good modeling primer and you should be ready to start the final paint coats. The color of the primer will depend on what is the primary color of the finished model and your preferences.
      Have fun modeling!
      Mike
      ATL

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      cesare747


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      Post #76917, posted on 11-19-2020 GMT-5 hours    
      Try, acetone.

      All the best,
      Cesar
      MIA

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      radioguy


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      Post #76918, posted on 11-19-2020 GMT-5 hours    
      Louie,

      As Mike said ^^, you should be OK with a wash & primer. But in case you're reluctant to go
      that route, you can always try Deluxe Materials Strip Magic.....

      https://deluxematerials.co.uk/products/strip-magic

      I've used it on a couple of models and found it to be very efficient in removing old paint
      while not attacking the plastic, or in your case, resin. Good stuff.

      Alan Aronoff
      CYUL

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      Ken Miller


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      Post #76919, posted on 11-19-2020 GMT-5 hours    
      I re-finished a Microscale 880 by stripping the decals with tape and sanding the paint down as much as I could. Some light coats of Tamiya primer covered what was left of the old paint. The model is in the gallery. I was very happy with the results. So no I did not have to strip all of the old paint before repainting it.

      Ken

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      louiej5


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      Post #76923, posted on 11-20-2020 GMT-5 hours    
      Thanks everyone. Good to know the model doesn't have to be perfectly clean before priming.

      I tried again yesterday with a different technique. This time, I presoaked some clean tissue paper with IPA, and as I scrubbed, I made sure the old paint was transferring from the model onto the tissue. When the tissue becomes stained, I changed it. My model is much cleaner now.

      I guess the problem I was having was that I was using a brush whose bristles were being stained by the paint. The stained bristles in turn spread the old paint to the rest of the model. Simultaneously rinsing with running water wasn't helping me.

      I will try other suggestions in the future.

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      Jennings


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      Post #76926, posted on 11-21-2020 GMT-5 hours    
      That's about all IPAs are good for in my book Much prefer a nice pale ale or a cold Pilsner style lager!