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The putty is melting the plastic
Norseman
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Oslo, Norway
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Posted: Thursday, February 24, 2005 - 06:06 PM UTC
I'm currently building a Tamiya Sd.Kfz 223. This kit needs a lot of putty!
Yesterday I experienced something I never seen before. If I put on a bit thick layer of putty, the plastic melted and did not get hard again.
I use Tamiya putty. Anybody experienced something like this?
What brand of putty do you think is be the best?
Grumpyoldman
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Posted: Thursday, February 24, 2005 - 08:15 PM UTC
Thin layers of putty would be the preferred way, letting each layer totally dry before adding another thin layer. The solvents in the putty, are basicly the same as in plastic cement, and too much will desolve, soften or distort your plastic.Not knowing how much you used, or how much melted, the only thing I would suggest is to put the model aside and let everything dry out. It may take a while though, and there is the possibility that it may take a long time for it to totally dry in the center of the putty/plastic glob mess.
MrRoo
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Posted: Thursday, February 24, 2005 - 09:40 PM UTC
I have to agree with Dave. The putty could take 4 or 5 days to dry out properly when used in large amounts.
Let it dry over time and do something else in the meantime
Uruk-Hai
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Posted: Thursday, February 24, 2005 - 10:06 PM UTC
Agree with what has being written above.

In the future for larger gaps, use a waterbased two component putty such as Milliput , A&B or Magic Sculpt.

One can also use streched sprue glued to the gap and sanded down when dry. This is especially easy when using a plastic glue that welds together the plastic, like Teenax for example.
Norseman
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Posted: Thursday, February 24, 2005 - 11:08 PM UTC
Thanks for the advise, you guys.
I'm going to try the milliput approach.

Delbert
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Posted: Friday, February 25, 2005 - 01:38 AM UTC
also if you can find it over there you might want to look for some squadron putty.. it seems to me a bit milder than tamiya dries fairly quickly and seems to me to be easier to sand....
AJLaFleche
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Posted: Friday, February 25, 2005 - 03:01 AM UTC
Welcome to the club! I think we've all been ther, done that and have the scrapped model to prove it! :-)
Any solvent based putty, including Squadron's, will do this in large amounts. One guy in the club used Squadron to weight down the nose of a jet. The nose procedded to fall off.
3442
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Posted: Friday, February 25, 2005 - 11:00 AM UTC

Quoted Text

I think we've all been ther, done that and have the scrapped model to prove it!


YES! okay, il calm down... ive had plenty of puty problems and destroyed kits with putty, but never had it melt.

squadron is a good choice, ive had mine for a whiel until the tub got pierced and everything dried inside

worked well when i had it tho

Frank
rv1963
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Posted: Sunday, February 27, 2005 - 03:33 AM UTC
I have used the squadron green putty to it can also melt plastic, you can put a primer coat on first and then apply a thin layer of putty i have done this it works.
IndyCopper
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Posted: Sunday, February 27, 2005 - 12:51 PM UTC
I feel your pain on the nose cone. I did that years ago with the then new Hasegawa 48th F-16. I knew it would be a tale sitter so bb's in the nose, and secure it with a large blob of Squadrons green putty. The next day the cone had shriveled up and was ruined. It never did dry out and harden up.
Norseman
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Posted: Sunday, February 27, 2005 - 06:14 PM UTC
Even tough the Sd.Kfz 223 has dryed up for some days now, the plastic is still soft.
But I found the solution. I gave it a coat of superglue and let that harden. Then I sanded it to a smooth surface. That did the trick.

And by the way, I use much thinner layers of putty now
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