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Dale, I would use Matthews polyurethane, simply because that's what I've been used to for the past year-and-a-half.
If the lettering enamel is fresh I would do it carefully. If it's One Shot with hardener I would feel more comfortable. For any who have never sprayed something hot over something that's not real hard, it can be tricky. Mist the first coats so it's not real wet with solvent and allow long flash times. I would use a medium/slow reducer and not overdo the hardener. Probably skip the accelerator.
One other point: brushing or rolling a satin finish like this will likely be full of streaks or blotchiness. Furthermore, using products that require adding flattening paste to achieve the low gloss can sometimes be blotchy even sprayed. Or maybe I just didn't mix well enough.
Brad in Kansas City
-------------------- Brad Ferguson See More Signs 7931 Wornall Rd Kansas City, MO 64111 signbrad@yahoo.com 816-739-7316 Posts: 1230 | From: Kansas City, MO, USA | Registered: Nov 1998
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posted
I've have good luck with Chromatic Waterborne Primer. I learned about it at the Tomahawk Letterhead Meet. A sign was made on aluminum using one shot and then sprayed with the chromatic product. It was an old Harley Davidson Ad made real big and put up somewhere in Town. Somebody from Tomahawk might say how it is holding up.
-------------------- John and Diana Grenier Up North Studio Les Cheneaux Islands Art Gallery P.O. Box 83 Hessel, MI 49745 906-322-2886 www.lescheneauxislandsartgallery.com Posts: 50 | From: Hessel, MI (Eastern U.P.) | Registered: Apr 2003
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