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From: paulhus@euclid.DEC
Newsgroups: net.rec.wood
Subject: Bubbles in Varnish
Message-ID: <2335@decwrl.UUCP>
Date: Tue, 28-May-85 12:14:45 EDT
Article-I.D.: decwrl.2335
Posted: Tue May 28 12:14:45 1985
Date-Received: Thu, 30-May-85 08:21:16 EDT
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Organization: DEC Engineering Network
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	Bubbles in varnish/polyurethane

	Since I always use polyurethane, this may not be applicable to
	varnish:  I have used a small amount of silicone spray lubricant
	to keep bubble formation down.  It works very well - the resulting
	surface is always glass-like.  BUT, the resulting mixture looses
	some desirable qualities - IT SAGS like crazy!  You can use it only
	on a horizontal surface, and IT DRIES VERY SLOWLY.  I rotated a piece
	90 degrees after a day of drying time and it still sagged!

	Putting silicone in polyurethane:  Use a large scrap of wood.  Spray
		a small amount of silicone lubricant into the can of poly.
		Stir.  Brush some of the mixture onto the scrap.  Keep
		adding silicone until your brush-out is free of bubbles.
		(My total is about 3 seconds of spray in a quart of poly.)

	N. Chris Paulhus  DEC Maynard, MA
	decwrl!dec-10382!dec-euclid!paulhus