Did you mean to attach a picture?

Alternatively, if you just want to get the water marks out of the wood: Set an iron to warm (not hot) and allow it to heat. Lay a cotton napkin or tee shirt over the water stain. Iron the stain through the cloth for 5-10 seconds, then remove the heat for 20-30 seconds. Repeat as necessary, buffing lightly with the cloth after every 2-3 heat cycles. A hair dryer may used instead of the iron. Set it to medium heat and hold 2-4 inches from the stain. Buff the stain with the napkin or tee shirt as you heat the wood.

Try wood and glass. Consider hanging the mirror vertically and about 5" from the sideboard top. You could also move the table under the light fixture, change it out for a chandelier, and put the sideboard and mirror on the clock wall where the mirror could double the chandy which should hang 36" or less above the table top.

Awesome Houzzers, thanks for the responses. Overwhelming consensus seems to be that they dont work (at least without distressing the table, which sounds complicated). I am now thinking maybe I move the sofa upstairs and buy it a new coffee table along the lines suggested by maureen and lee lee (thanks). In the living room, I could then leave the oak coffee table, together with the armchair that works with it (it has a similar oak frame and is covered in natural linen). Then I can find a new sofa to match the coffee table. Any tips? The coffee table is 1200 x 1200mm. You guys seem to think that is ginormous - how big would the sofa need to be to look proportional? I am thinking of an L shaped sectional. Possibly also in some kind of natural linen fabric? The living room is big (5m x 8m?). Thanks again - much appreciated!