Author Topic: Technical Advise - Straightening out Resin Parts  (Read 1716 times)

visible

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Technical Advise - Straightening out Resin Parts
« on: December 29, 2010, 04:45:24 PM »
Hello All:

I have a technical question for the experienced modeler.  Iím working of a solid resin kit which is over 12 - 15 years old.  Two of the parts need to be straightened out of an improper shape their in now.  How do I do this?  Could I apply heat, and if so, any suggestions? 

Thanks. 

John

Jim Bertges

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Re: Technical Advise - Straightening out Resin Parts
« Reply #1 on: December 30, 2010, 02:18:11 PM »
There are a couple of methods. If it's a thick part, like an arm or leg for instance, you can immerse the part in boiling water for 20-30 seconds (the length of time immersed will vary depending upon the part, you might want to experiment with that.) Be sure to use tongs and heat resistant gloves to protect yourself; then bend it to the proper shape and hold it until it cools. For thinner parts you can heat them up with a blow dryer until they are pliable and reshape them using your hands (again, be sure to protect your self from burns) or pressing it between heavy flat objects (if the par it supposed to be flat).

I'm sure our fellow modelers will have some other helpful suggestions as well.
You knew the job was dangerous when you took it, Fred.

visible

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Re: Technical Advise - Straightening out Resin Parts
« Reply #2 on: December 30, 2010, 04:25:21 PM »
Thanks Jim.  It has also been suggested that once heated and shaped, I cool down the resin part immediately or else it will spring back to its original shape.

John

monahan13

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Re: Technical Advise - Straightening out Resin Parts
« Reply #3 on: December 30, 2010, 05:31:39 PM »
do you guys know if i have a resin model that i sanded smoth then wanted to paint, should i prime it? if so what primer should i use? will the primer fill in any of the details?

this is my first model
thanks ryan

visible

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Re: Technical Advise - Straightening out Resin Parts
« Reply #4 on: December 30, 2010, 06:17:02 PM »
Ryan:  I suggest that you do all of your prep work like sanding, adding putty, etc. before priming.  As for a primer, I've read and seen in the videos to use a auto primer.  The one I use is PlasiKote and buy it here:  http://www.amazon.com/PlastiKote-T-235-Sandable-Primer-Enamel/dp/B000CPAA3A/ref=rsl_mainw_dpl?ie=UTF8&m=ADG953YR6NRBF   You'll want to use it AFTER you've prepped and washed your kit with soapy water.  Most model makers use a mold release and the washing step is critical to make sure the primer, or any paint adheres.  Spray it on lightly and in layers, try to avoid filling in details.  Hope this helps and happy modeling!

John

monahan13

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Re: Technical Advise - Straightening out Resin Parts
« Reply #5 on: December 30, 2010, 09:27:08 PM »
john, so you basically need to prime for a good paint job? but you can sand down the primer to smooth out certain areas?

visible

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Re: Technical Advise - Straightening out Resin Parts
« Reply #6 on: December 30, 2010, 10:32:52 PM »
Ryan:  Sure.  The primer can always be sanded down.  That's why this type, the sandable primer is recommended.  Also, I recommend David Fisher's excellent series of videos put out by Amazing Figure Modeler, see:  http://www.modelmaniadvd.com/.  Fisher too recommends using a primer for proper adhesion of paint to resin or vinyl kits. 
« Last Edit: December 30, 2010, 10:38:50 PM by visible »

monahan13

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Re: Technical Advise - Straightening out Resin Parts
« Reply #7 on: January 01, 2011, 11:33:21 PM »
visible: so bare with me lol this is my first model, SO the primer that i spray onto the model wont fill in details like in the face and like the button on the jacket, the really fine details?

since its a resin model im thinkin that it would soak in a bit and not clog up and of the textures on the face and hair.

ANY ADVICE FROM ANYONE WILL HELP ALOT.

thanks ryan!!

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Re: Technical Advise - Straightening out Resin Parts
« Reply #8 on: January 02, 2011, 06:29:37 AM »
Ryan:  If you go lightly with the primer, you shouldn't fill in any fine detail.  You may want to practice on another scrap model or old toy figure to see how much affect the primer has on the detail.  If you use it lightly however you won't lose any detail.  Practice first. 

westbatman

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Re: Technical Advise - Straightening out Resin Parts
« Reply #9 on: January 02, 2011, 10:28:44 AM »
Ryan,

On reshaping the parts I have used with success the boiling water technique but I always do this right next to the sink with a stream of ice cold water running from the faucet. Once I dip the part in the hot water and let it sit for a few minutes 9be careful if this is a hand with separate fingers), then with appropriate hand protection I remove it from the water and then hold it's shape and run it immediately under the cold stream which instantly locks it in place.

I can't stress enough the thorough cleaning of any model part, be it resin, vinyl or plastic prior to assembly. While painting I wear thin cotton gloves or latex gloves to keep my hand oil from transferring to the model.

A light hand on the primer is best. I warm my primer in a bowl of hot (NOT BOILING) water for a few minutes, dry it off and shake, shake, shake it. Wear a respirator and use adequate ventilation while spraying. Lightly dust the model with primer, several light coats are better than a heavy hand. When using hobby acrylics make sure you look for opaque on the bottle unless of course you want it semi-transparent.

Enjoy!

Andy

visible

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Re: Technical Advise - Straightening out Resin Parts
« Reply #10 on: January 02, 2011, 04:10:05 PM »
Andy:  Thanks for the straightening out resin tip!  John

 

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