Just got a new mahogany front door and the guy who installed it said to use at least 4 coats of yacht varnish. Will I do any damage by applying ronseal 5 year woodstain in a teak colour over the yacht varnish ? I don't want the door to be a completely different colour to my windows which have teak woodstain on them. Have checked through all the previous threads but am still not sure what to do. Thanks in advance for any advice as I am a novice in these matters. Rgds Nova.