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MinWaxi Polyurethane on trim pieces question?

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MinWaxi Polyurethane on trim pieces question?

Old 02-18-2018, 09:37 AM
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jaj333
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Default MinWaxi Polyurethane on trim pieces question?

I am putting together a Sabre 47 Profile ARF. I was reading about a build a guy did on one and he covered all the trim pieces with MiniWax Polyurethane. to make sure they don't come off. I had never heard of that. Has anyone else used that method? If so I would assume you'd use the gloss Polyurethane? How does it look. Would appreciate your opinions. Thanks
Old 02-18-2018, 11:11 AM
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I have not used WBPU, but I have spayed a lot of ARFS with other types of clear coats. The old Formula poly, Kyrlon Crsytal clear, Rust-o-lium. I have not had any of the covering lift after I did that. I did not just spray the trim, I gave 2 coats to the whole air frame.


Buzz.
Old 02-19-2018, 04:30 AM
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TomCrump
 
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Minwax Polyurethane is oil based and will yellow. I wouldn't use it to seal trim pieces, alone, as it would eventually exhibit a "yellow" ring around them. If the entire air frame was coated, no yellow ring would be evident.

Minwax Polycrylic (water based) does not yellow, but it is not fuel resistant, if that is a consideration.

Last edited by TomCrump; 02-19-2018 at 04:32 AM.
Old 02-19-2018, 10:33 AM
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jaj333
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Thanks guys
Old 02-19-2018, 02:45 PM
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tailskid
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Tom, is that GLOW fuel or gasoline that it is not fuel proof?
Old 02-19-2018, 04:00 PM
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TomCrump
 
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Originally Posted by tailskid View Post
Tom, is that GLOW fuel or gasoline that it is not fuel proof?
Jerry, I use the term "fuel resistant" as few products are really fuel proof.

Most paints resist the effects of gasoline, as long as they are not repeatedly exposed to it. Glow fuel, with it's 15+ percentage of oil, is harder on finishes. Minwax Polycryllic and glow fuel are a poor combination as glow fuel turns the stuff to goo.
Old 02-19-2018, 04:30 PM
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tailskid
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That's good to know Tom because I'm going to be starting on a Giant Scale P-47 ARC and plan on glassing it with a WBPU and using the peel-ply method. I'd like to use Deluxe EZE-KOTE but at $20 a bottle, Minwax is a lot cheaper and it is a BIG plane!
Old 02-20-2018, 06:40 AM
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pacoflyer
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Tailskid,
I think you will find that using the water base Polycrylic is fast, easy to apply and makes for a quick clean up. I've used it on lots of projects with decent results.
At the end of the day though, it's just not as tough and dent resistant as the epoxy. What are you using for the "tear off" material for your peel ply?.

Thanks,
paul
Old 02-20-2018, 09:18 AM
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tailskid
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Paul, thanks for your input...as far as material to be used has not been purchased yet...any suggestions would be appreciated. Would it be wise to use a coat of thin epoxy over the WBPU?
Old 02-20-2018, 11:10 AM
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Originally Posted by tailskid View Post
Would it be wise to use a coat of thin epoxy over the WBPU?
If you feel that there's a need for epoxy, why use WBPU at all ?

May I inquire as to what you have in mind ?
Old 02-20-2018, 11:59 AM
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tailskid
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Good point Tom, darn, you are always thinking..... Paco indicated the WBPU isn't as strong as epoxy - I'm more concerned with hangar rash then strength. Your thoughts are appreciated.

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