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  • Thing with coverstain is you lose moisture vapour permeability. For traditional I always prefered the 3 part oil based weathershield system.

  • Last I knew from that [edit assuming it's Dulux] was the wood preservative, then w/b clear (yes clear primer) topped with oil ultimate opaque (effectively exterior oil egg) . But just mentioning coverstain has reminded me how practical it can be and where I'll need to use it

  • I very rarely use an eggshell on exterior woodwork. White gloss gives the longest life so that's the best choice as far as I can see. Probably helps that I'm mostly working on victorian properties.

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