Painting over oil based exterior wood finish

11 Oct 2017
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United Kingdom
Not sure how to repaint an inherited summer house. The exterior is reasonable sound but has been painted with an old oil based paint. I have repaired rotten shiplap, filled and sand exterior to provide a key. What is the best paint to use to repaint the entire exterior, it is not possible to take it back to bare wood?
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Why not just use another oil based paint? Eg. Dulux Trade Weathershield
Water-based Sadolin Superdec, which comes in a small range of solid colours, is a quick drying paint which resists cracking and flaking, and sticks well to properly sanded old oil-based paint.
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