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I’m getting confusing information regarding using spar varnish on black walnut. Does anyone have any experiance with particular brand that seems to hold up well when used outside?
Some of the marine finishers don’t recommend spar for black walnut citing reaction problems, adhesion problems, and coloration problems. Just about the worst kinda reccomendations you want to hear. Yet there was no consistant second recommendation.
Outside climate varies from plus 100 degrees to close to 40 plus below, western exposure, humidity from 100% to desert dry. (Minnesota)
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Replies
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Frenchy,
Yup, for some reason spar varnish and Walnut don't seem to get along for outdoor applications....Use a 2lb cut of super blond shellac, then go with Interlux or Epifanes spar...
Dano
*As Dano says, marine coating manufacturers know spar varnish. Go to a marine supplier or chandlery.That said, unlike most woods, walnut lightens when exposed to sunlight. Even spar varnishes with UV protection have limited value.Walnut is not generally used outdoors. What is the application?
*Howard, I'm usin' it for a timber frame where the black walnut is outside. (actually a double timber frame, white oak on the inside) hate to just paint it.
*Dano, Contacted Epifanes and they said in no uncertain terms not to use their product in this application. Haven't tried Interlux. Will shellac hold up here or am I askin' for it?
*Frenchy, I wonder if you could just use UV sealer and protector on the Walnut. I have a gallon of it that I use on my deck and fences. I didn't see anything on the can about not using it on walnut.Steve
*Steve, The trouble is that I just can't experiment with this. I mean if you've ever seen a poorly finished piece of furniture you'll know what I mean. To do all that work and find out later that it's a no-no would have me lookin for a fresh rope to hang my self with! It's not just the puttin it on part, but also the scrappin and sandin' off part while dangelin' 28 feet in the air that troubles me.
*Frenchy, I understand. The only walnut I have right now is black walnut, I wonder if that will react the same. I have a few cutoffs I could test for you. I just bought a can of UV Spar yesterday and I have a gallon of the UV Sealer. Actually, I'd really like to see what happens to it. Of course the law of averages says that my test will show no problems but when you try, it will be another story.Steve
*Steve, yes mine is black walnut. It'd be nice if you can figure out the durablility for say the next ten years or so and by the way I'll be needing results by next month...;-) Of course if my results differ I assume you'll be here to help me refinish it. :-) by the way, how do you feel about dangleing off a rope 30 feet or so off the ground?
*Frenchy, now I really understand. Well, maybe I think I do. Yep you need to be looking a consumer reports or something. As for the rope and dangling thing. I only mind it when the person on the other end is wearing a hood over his head and I don't get to pick where the rope is tied to my body.I suspect that if I gave you good results and they turned out bad, you'd be the one wearing the hood.O.K. the offer to test is off. LOLSteve
*Steve, I found out that I can't tie that particular knot with the hood on my head, so I'll just put the hood over YOUR head! Hey, when we play this game can I tie your hands and feet too? ROTFLMAO
*Frenchy, sorry I'm not sure how to take that last one..... Other than ROFLOL...I just have to say no to the hands and feet. Once around the neck is about all I can take at 30ft. ROFLMAOSteve
*Frenchy, here is a firm that makes products for log homes. http://www.velvitproducts.com/products.htmTry them. I would ask around at those firms who specialize in log homes. They may be best able to help you.If all else fails, give my your address. The value of the walnut may be more than the value of your house. I may come up a steal some logs while you are asleep. Someone in my town put in a sod lawn a couple of years ago. One night someone rolled up much of it a took it away.
*Howard, Thanks they too offer Stains etc. Not sure that I want to stain black walnut... Besides their chemistry lists Iron oxcids. The Tannins in black walnut will attack them and then I'll have a problem. Better hurry and get here before they all go up, they will be milled and drilled in place and you'll make a hellava noise trying to get them off..;-) Oh, would it bother you if I told you That I paid less for the black walnut then for the sheet rock? (Per bd. ft.)
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