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Author Topic: Sig Polyester Finishing Resin  (Read 3444 times)

Offline Avaiojet

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Sig Polyester Finishing Resin
« on: June 07, 2017, 12:55:59 PM »
Anyone using Sig Polyester Finishing Resin?

CB
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Offline john e. holliday

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Re: Sig Polyester Finishing Resin
« Reply #1 on: June 08, 2017, 11:18:40 AM »
Quit using it years ago as it was hard to sand and also came out heavy. D>K
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Online Will Hinton

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Re: Sig Polyester Finishing Resin
« Reply #2 on: June 08, 2017, 03:09:51 PM »
Z poxy, Charles, Z poxy.  Luuuuv it.  (I even often use it for grain filler on custom guitars.)
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Online Brett Buck

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Re: Sig Polyester Finishing Resin
« Reply #3 on: June 08, 2017, 08:05:53 PM »
Quote from: Avaiojet on June 07, 2017, 12:55:59 PM
Anyone using Sig Polyester Finishing Resin?

  Grossly obsolete, use finishing epoxy instead, far more stable, far less stinky, won't get as brittle, and no MEKP to make you go blind if you get it in your eye.

    Brett
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Offline RandySmith

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Re: Sig Polyester Finishing Resin
« Reply #4 on: June 08, 2017, 08:41:13 PM »
Quote from: Will Hinton on June 08, 2017, 03:09:51 PM
Z poxy, Charles, Z poxy.  Luuuuv it.  (I even often use it for grain filler on custom guitars.)


Finishing resin epoxies  are a  giant step above  polyester resin, but  I admit I do miss the cup melting off the sides if you mix too much, with just a tad too much hardener :-)

Randy
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Online Brett Buck

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Re: Sig Polyester Finishing Resin
« Reply #5 on: June 08, 2017, 10:12:52 PM »
Quote from: RandySmith on June 08, 2017, 08:41:13 PM

Finishing resin epoxies  are a  giant step above  polyester resin, but  I admit I do miss the cup melting off the sides if you mix too much, with just a tad too much hardener :-)

  Don't forget the smell, that's really the best.

     I had some sort of epoxy boil in the cup not too long ago, but it didn't melt it. It cured in mid-boil and looked just like clear foam. That's one thing I really like about EZ-Lam from Aerospace Composites - it doesn't self-heat *nearly* as much as many of the others, so you don't have to spread it out on foil to maintain the working time.
 
    Brett
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Offline Mike Ferguson

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Re: Sig Polyester Finishing Resin
« Reply #6 on: June 09, 2017, 08:50:41 AM »
I put a mixing cup of epoxy on top of a foam cradle while sheeting a wing not too long ago. The cup actually sank completely through the cradle down to the table, making a very nice, neat hole.

EZ-Lam is definitely the way to go.
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Online Will Hinton

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Re: Sig Polyester Finishing Resin
« Reply #7 on: June 09, 2017, 08:15:43 PM »
Quote from: RandySmith on June 08, 2017, 08:41:13 PM

Finishing resin epoxies  are a  giant step above  polyester resin, but  I admit I do miss the cup melting off the sides if you mix too much, with just a tad too much hardener :-)  

Randy

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Offline Tim Wescott

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Re: Sig Polyester Finishing Resin
« Reply #8 on: June 09, 2017, 08:34:30 PM »
Quote from: Brett Buck on June 08, 2017, 10:12:52 PM
  Don't forget the smell, that's really the best.

That reminds me -- it was always the marijuana smokers that complained the most about the smell of polyester resin at my dad's shop.  Something about smokin' dope that really makes resin smell bad.

Quote from: RandySmith on June 08, 2017, 08:41:13 PM
Finishing resin epoxies  are a  giant step above  polyester resin, but  I admit I do miss the cup melting off the sides if you mix too much, with just a tad too much hardener :-)

A quart of polyester resin in a gallon bucket, mixed hot, will burst into flame and set off sprinklers 14 feet above the floor.

Makes a hell of a mess, too.
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Online Will Hinton

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Re: Sig Polyester Finishing Resin
« Reply #9 on: June 10, 2017, 06:09:48 AM »
And just how might you know about that, Tim? H^^  (You didn't tell us not to ask.)
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Offline Randy Powell

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Re: Sig Polyester Finishing Resin
« Reply #10 on: June 12, 2017, 02:55:59 PM »
Tim does a lot of dumb things so you don't have to.
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Offline Steve Helmick

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Re: Sig Polyester Finishing Resin
« Reply #11 on: June 13, 2017, 03:17:57 PM »
Z-Poxy finishing resin is sooooooo easy to sand. Plus epoxies in general have vastly longer shelf-life than polyester resins, there's no reason not to go with epoxy.

Someplace I worked, there was a younger guy working there that had previously worked for a company that used polyester resin. The story was that they tasked him with disposing of a 55 gallon barrel of outdated polyester resin. I his youth and enthusiasm (I suppose), he mixed in the appropriate quantity of MEKP and stirred it well. After the flames and smoke subsided, he was told to seek employment elsewhere. And so, he came to work for the dipchits where I was employed.  LL~ Steve 
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