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johnpeter_gw

adhesion problems to old oil-based enamel surfaces

johnpeter
12 years ago

I've been repainting interior rooms of my house during the last couple of years using water-based paints from Lowe's. I have had excellent adhesion results on flat surfaces... hallway walls, bedroom walls, etc.

Where old enamel exists, however, adhesion has been a problem, even though I cleaned the enamel and used reputable water-based primers. (Zinnser, Kills, etc.)

The enamel underlying my problem was applied some 16 years earlier. It was an alkyd (oil-based) interior paint from Dunn Edwards.

I avoid sanding here, as I want to avoid dust. Perhaps I could wet-sand. I have not used a de-glosser.

In one bathroom, I didn't use primer, two years ago. The water-based enamel I applied has pealed horrendoulsly... I think I'll have to STRIP all the paint off, down to the PLASTER. Eegads. I don't think I can even use a steamer (suitable for pourous coatings like old wallpaper.) I might have to use chemical stripper... at great personal peril.

So I am appealing for advice on appropriate PRIMER PAINT, so I might preclude these misearable developments in subsequent efforts in bedrooms that still exhibit the old Dunn-Edwards painted surfaces. By the way, that stuff never pealed! It is rock-hard and thick, too boot.

The Lowes water-based enamels are gorgeous to look at, with their amazing colors. But they seem to apply thinly... a virtue I like... but perhaps that thinness is a problem from the standpoint of robustness.

So I see myself using REAL TSP to clean old enameled surfaces such as closet doors; wet-sanding; then de-glossing chemically (yikes).

Then I want a truly-sticky primer.

Shouldn't I get better results with an alkyd-based primer?

Keep in mind I intend to use a water-based enamel on top of my new primer.

Thanks in advance!

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