@Tani H-S Most professionals that refurbish uPVC windows will spray. You need the right equipment, you must prepare the surfaces properly before applying and most importantly you need the right paint (that properly bonds to the surface, has UV protection and thermal movement elasticity). If you don't use a professional and you have problems, you can always get a quote for new windows from YES Glazing Solutions - our windows are available in over 200 RAL colours! https://www.yesglazingsolutions.co.uk

How exciting! Its funny how deep they look when there is no water in them. When you fill it with water it will seem much shallower. First on some practical points the radiator is a slight concern. What you really need is a small air handling package that is linked to the water temperature and that will ensure the air in the pool house is always a couple of degrees warmer than the water in the pool and is circulating to avoid condensation. It would be good to identify who installed the pool (There might be labels on the pool plant) and to get them in to overhaul and recommission it. You could replace the sliding doors with really good quality (Schuco) sliding folding doors so that the whole lot could be opened back on a sunny day. You could get rid of the radiator and make those windows into full height doors as well. The brick walls are a bit sad - but would be a great surface for fixing slate, stone or tile, and for the floor you could look at a non-slip ceramic porcelain large format tiles. We use Solus Ceramics. http://solusceramics.com Lighting is always tricky - if you put lights in the ceiling over the pool it can be hard to change the bulbs. We have got round this in the past by using fibre optic projector lighting (One central lamp and the light is conducted along inert glass cables to the fittings) but it is quite an expensive option, or instead uplight the ceiling using floor or wall lights. In that case you have to think about what it is that you are uplighting - That acoustic tile ceiling belongs in an office - I would love to replace it with a timber ceiling which would be worth uplighting. http://www.universal-fibre-optics.com/pool-and-wet-area-lighting-projects What part of the country are you in?

Yes ma'm, i know that, but i built a second home in somewhere Borneo island, and in here don't have any speacialist or even exterior designers in this island.. So, i the one will find all by myself and paid the contractor and the workers to built it.. i even bought the tiles and the things in the borneo city and its quite far from here cuz im in the quite small island in borneo.

I think you should take a tip from Spas where they understand that too many watery colours are an overload. Consider adding a wood or stone covering to the wall and then take your paint colour scheme from that.