Had a quote for all new Windows and doors. Presently have wooden sills and picture framed in the bedrooms (dorma) . The compactness said they would install wood but wouldn't guarantee it as it will buckle/ swell/ discolour. They are pushing a coated msg rosewood affect. What is the opinions on this material ?
Do you mean window sills or window boards? Normally the interior feature (which I assume you mean) is referred to as a window board.
If you want the effect of bare wood, then I would use wood; MDF, however prepared, will never look right. I fitted softwood window boards in my bedrooms and varnished with Ronseal Mattcoat varnish (my favourite varnish of choice for most applications, as it leave the wood looking fairly natural).
Not a fan of MDF.
Cheers
Richard