My correspondence with a vendor:


Date: 2004-06-01 14:46:42 -0400 (Tue)
From: "Doug Theobalds"
Reply-to:
To: "steen"
Subject: PU varnish on epoxy ?
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Any of the two-part Polyurethanes will offer the best in adhesion and
hardness over epoxy. Ensure that the Amine blush has been removed from
the epoxy. As long as the surface is clean, dry , and sanded, apply full
strength.

Doug Theobalds
70 Water Street

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keep in mind that most clear coats (including pricey 2 part urethanes - awlgrip
(tm) type coatings) - contain almost no UV blockers. I know of only two that do
- auto clear coat being the primary one.
Also aware of a water based clear acrylic that has uv blockers.

These clear UV blocking topcoats usually find their way on to bartops and table
tops...

pigment, in the epoxy or in a topcoat, are considered the primary UV blockers.

paul oman
progressive epoxy polymers
www.epoxyproducts.com/marine.html