Old 05-14-02, 04:30 PM
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When should you prime and what is the best way to do it? Do you need a specific type of brush or roller?
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Old 05-15-02, 03:34 PM
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Some instances include:

Drastic change of color
Painting over oil with latex
Painting non-porous surfaces (laminate, panelling, varnish, plastic, tile, glass, chrome)
Sealing a porous surface (drywall taping seams, patches, old chalky porous paint, masonry, wood)
When using a deep, clean, dark color
Covering stains and odors (water, smoke, tannin, knots, crayon)
To ensure uniformity of sheen and depth of color
Painting bare metals (ferrous especially)
To seal in lead-based paints
To eliminate grafitti

For each job, there is a corresponding primer, a correct primer. Many are water-based, some alkyd (a synthetic oil-based product), some oil (with true linseed oil in them) and some solvent (ie alcohol or shellac-based). Some are junk, full of chalk. The applicators will be dictated by the type of primer used, but generally, a synthetic brush (polyester, nylon) and a 3/8-3/4 inch nap sleeve will do.


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