Hi Suzanne The panelling in Perth is usually done with (believe it or not) Cedar panels / planks which are then prepped and painted. Most of the high end work is done this way. You can do it in MDF however and any good chippie will make it work. We recently restored a 100 year home in a Hamptons Style home and all of the stair well panels were cedar also. The second storey panelling we did had to be fabricated in MDF to get the detailed sizes and other than the dents in the old (from many years of enthusiastic use) you can't tell the difference. For skirting, a lot of the profiles are made up as one offs by builders that are used as a kind of signature. The same with doors. We made new solid doors to match the old at a timber joiner. The skirting and door profiles are usually made up by executive doors and mouldings in Malaga. They have a good range for you to start with as does Subiaco Restorations in Osborne Park. Cheers

I love the timber panelling, maybe with a bit of a clean it will look a bit lighter, but in any case, I love it! I actually think some lighter flooring would make the room work better - not what you were asking about I know! The current flooring being dark and matte sucks a lot of the light out of the room and also makes the timber panelling/fireplace feel heavier. Even a lighter rug (or even a fun Ikea Stockholm rug?) could make it look more crisp, fresh and stylish, whilst still giving a nod to your home's gorgeous retro features. A fresher light fitting - maybe a simple drum style?) would make it look more modern also and less busy to allow the original features to be the focus. Your existing armchair etc suit it beautifully though! The fireplace I'm not sure about - I hate to ruin original features but I'm not sure about that?! Maybe wiht the other changes done it might work much better anyway? Otherwise an interesting tile or sandstone cladding could work beautifully with the timber tones?

I wouldn't use putty though. Spac filler perhaps? But honestly, it would take a huge amount of work. If you paint the walls a mid range colour (darker colours hide sins), or at least a fresh coat of paint, add your furniture and style nicely, the rooms would look lovely and those wretched cover strips would become much less noticeable. Why not try living with them for a while and see if you still feel the same?

The timber battens on their own will not block a lot of noise but if you were to do that you could line the wall behind them with a sound blanket. Real timber is slightly thicker than mdf so it does do a slightly better job. However sound travels through solids, you need something to break the transmission. Have a Google to sound proof a room or soundproofingproducts.com.au