Stained ceiling tiles.


This single floor, plus full in ground basement, bungalow, has ceilings of those one foot square fibrous interlocking tiles. In family room and the adjoining kitchen and hallway (About one third of the main floor area) they were covered over with plasterboard which was then refinished with that rough plaster finish, sometimes called 'stipple' or 'stucco'. Nothing above those ceiling to drip! Yup; it's very much a house of the 1970 which has served us well and economically! Some condensation from the 3 inch metal bathroom ceiling fan vent, located in the cold attic, on its way to outside, at one time dripped onto the ceiling of one of the bedrooms. No permanent damage and been dried up for years, but left a rusty looking stain. A previous attempt to use a flat white ceiling paint not very successful. Didn't 'cover' at all well! it just sort of whitened the stain a little! Am about to try using shellac over the stained. area; then planning to repaint whole ceiling. Or will I need to shellac whole ceiling and then repaint that. Any advice or better method suggested most welcome. TIA
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that's why they make kilz, which is a white tinted shellac. just paint that over the stain, then paint the whole ceiling.
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On Wed, 11 Nov 2009 14:31:49 -0700, "charlie"

Water-based Kilz latex is a "shellac" ? I've not heard that before.
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there are multiple kilz products.
you've heard of everything in the world?
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On Wed, 11 Nov 2009 13:28:18 -0800 (PST), terry

based or pigmented shellac. Some even come packaged in cans that spray up. Overlap the stain by at least 6". If you're new at this, use a couple of thin coats about 20 mnutes apart. Allow to dry for about an hour then paint the whole ceiling with the paint of your choice.
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