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| 2K urethane users? http://w-ww.luthiersforum.com/forum/viewtopic.php?f=10102&t=2323 |
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| Author: | Josh [ Wed Jun 29, 2005 2:32 pm ] |
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Anyone here using 2K urethanes? Just got a gallon of sherwin williams polane, and the data sheet dosn't mention recoat windows. I've seen catalyzed coatings lift before when I didn't pay attention to the recoat window, and I want to avoid that. What's your finish schedule, 2K users? |
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| Author: | Tim McKnight [ Thu Jun 30, 2005 12:50 am ] |
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I use McFaddens and here's my schedule. 1.5 hours between coats. 3 coats MAX per day. After three coats are sprayed, wait two days and level sand with 220. Shoot three more final coats, wait 7-10 days, sand and buff. You can buff in 3 days but you will experience shrink back so a longer wait is better. |
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| Author: | Josh [ Thu Jun 30, 2005 2:48 am ] |
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Tim, Thanks for the info. I got a message back from SW today and they say that the 2K has no critcal recoat window. I'd like to shoot more than one coat a day, but Polane has a really slow dry time, like 3-6 hours to touch. I think I need to get thier accelerator. I do like the stuff though, tough as nails. |
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| Author: | Robbie O'Brien [ Thu Jun 30, 2005 3:14 am ] |
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Hey Josh, I use the 2 part urethanes and love them. I have posted my finishing schedule somewhere here before recently. Basically, I apply 2 coats at 1 1/2 hour intervals on the first day. Let dry overnight and sand with 180 grit. Apply two more coats at 1 1/2 hour intervals and let dry overnight again. Third day same as day two. Day 4 or 5 buff to your hearts content and then smile at your reflection. 
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