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Getting Ready to Assemble My 1967 Mustang Fastback Project, Quick Question.....

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  • Member since
    March 2008
  • From: West Palm Beach, Florida
Getting Ready to Assemble My 1967 Mustang Fastback Project, Quick Question.....
Posted by mic53mlb on Thursday, September 9, 2021 1:02 PM

Hey guys,

           just got some free time to put togther my AMT 1967 Mustang Fastback GT, it's taken me awhile to get together some custom parts as I'm deviating from the stock build. For proper primer and paint adhesion should I soak the kit overnight in laundry or dishwash detergent ?? Any other prep I should do before I shoot primer ?? Any and all advice and or suggestions is appreciated.

  • Member since
    June 2014
Posted by BrandonK on Thursday, September 9, 2021 1:07 PM

It's never a bad idea to wash the parts before priming. No need for overnight soaking.

Simply wash them with soap, and then dry them off. I will use and old toothbrush to scrub things. Prime and paint. I often, more than not, will also wipe the parts with alcohol before priming. That is all you will need most of the time for good adhesion. If you want on car bodies you can also scuff the surface with something like 3000 grit paper, wash, dry and them prime if you really want to make sure.


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  • Member since
    March 2003
  • From: Towson MD
Posted by gregbale on Thursday, September 9, 2021 1:08 PM

Unless there's visible evidence of something like a mold release agent -- which has been pretty rare on most mainstream models for decades, now -- I will generally just give a good rub-down with alcohol and a lint-free cloth to make sure fingerprints and skin oils are gone. Soaking seems needless unless there's a specific issue.


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  • Member since
    March 2008
  • From: West Palm Beach, Florida
Posted by mic53mlb on Thursday, September 9, 2021 1:32 PM
Thanks guys for the info, I think I'm going to rinse the parts in light soap and water, then rinse, and dry. For the body, hood, trunk lid, and anything else body color, I'm going to use alcohol and follow with a tack cloth. Anyone else with suggestions please keep them coming !
  • Member since
    November 2018
Posted by oldermodelguy on Thursday, September 9, 2021 2:20 PM

A couple of years back I just went back to Odorless Mineral Spirits as my wipe down. Once dry I just blow everything off with the airbrush before I fill it with paint and shoot primer. But my primer is Stynylrez and when I used alcohol I noticed this funny looking motor oil in water look to the surface of the primer. It didn't do anything weird but I didn't like that so went with the MS.

  • Member since
    April 2020
Posted by Eaglecash867 on Friday, September 10, 2021 6:12 AM

Just an addition to the advice on scrubbing with a toothbrush:  I use a cheap electric toothbrush for scrubbing parts (use it for both washing and stripping paint).  Because of the tiny oscillations it makes for the scrubbing action, its not as likely to break off delicate details if that's ever a concern.  All my parts (styrene and resin) get a soak in undilluted Simple Green, a rinse under hot water, and a quick dunk in 99% isopropyl alcohol to speed up the post-wash drying process.  Larger parts get a good scrubbing with the electric toothbrush and some Comet (with that, you just have to use the brush again when you're rinsing to make sure you get all of the Comet residue off).  I could probably get away with doing less, but misjudging the likelihood of paint adherence issues can cost me a lot more in terms of time, so I just do it with everything, regardless of how new it is. YMMV.

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