Clean Fir Prep for Water-based Paint
My son accidentally spilled melted butter on an unfinished
countertop of bare fir plywood. What could be used to clean it so that
water-based paint would stick to it?
Apply a poultice of Fuller’s earth and
water (a paste) liberally to the surface, and then heat the surface to
120 F or so. Repeat several times to draw out as much of the oil as
possible. A wash coat of dewaxed shellac, such as Zinsser SealCoat™
before the water-based paint would help the adhesion.
Another method is to scrub the area with
liberal amounts of mineral spirits on a nylon abrasive pad, and then
sop up the slurry with paper shop towels. Repeat, then after the wood
is dry, seal it with a good primer, such as Zinsser BIN®
, prior to
painting, assuming that by paint you mean a solid opaque color and not
a clear finish.
This article originally appeared in the Woodworker's Journal eZine.
Click here for information on this free, twice monthly online publication.
Copyright; 2010 Woodworker's Journal
All rights reserved. No part of this article may be reproduced in any form or by any electronic or mechanical means, including information storage and retrieval devices or systems, without prior written permission from the publisher.