The space looks a bit cold & clinical at the moment. Add sheer curtains to the window from ceiling to floor this wall Add some drama and also help to soften the look. I don't think the corrugated iron works use timber instead . A rug will better define the space perhaps with pops of colour like yellow , orange or red this will add some warmth. Prints on the wall , large pot plants side tables and floor lamps . In the billiard area it would look good to add a pendant lamp over the table you can buy ones specifically for billiard tables . More pops of colour also a couple of occasional chairs . You could also add more timber here to give more ambiance. Happy decorating .

If you want rusty corrugated just get some mild steel rolled by your corrugated supplier. galvanising is way too hard to remove and will actually cost more than rolling new mild steel sheet. If you want fast rust just give it a light grit blast to remove the mill scale. It is not really needed as it will get there after one winter anyway ( as long as it is in full weather.

Hi, If you're in Oz, talk to Superlight (www.superlight.com.au) they're specialists in LED lighting and do commercial and domestic installs and products. We used them for our bathroom reno and will use them again for our kitchen/laundry/patio and balcony reno - I found the staff (Jenette in their Sydney office was incredible) helpful and supportive talking our sparky through some of the process that was a bit unusual (naturally, I had to have the smallest lights and lots of them in the ceiling for something different as well as have them all on a dimmer and had diffused strip lighting under the cabinetry and had to be wired into one gangplate . Check out their website - it'll help answer a lot of questions and spark ideas of whats possible and I can personally recommend them.

I should note... Not to scale. Frame will be 2m high and approx 1.5m wide