Well I'll try to make a 3d of the room and upload it. But that will take some time. Thank you :)

Hello - do you mean paint for the walls? I have seen many bathrooms in other countries, not just India, that have a combination of paint/tiles so don't understand why this would be an exception

Hi Julie You can apply 2 coat of red oxide primer to the dry floor surface.That will serve your purpose. Ask for 'red oxide primer' and get half ltr turpentine also. Loosen the primer by mixing turpentine a bit..Apply the second coat after 6 -8 hrs.. Red-oxide primer is actually used on metal surfaces to protect it from rusting. Regards Jestin Thomas Renovart

Simple! Avoid paint! Simply buy 2 sheets of laminate (one for front and back each) that matches with the rest of your doors, and paste it on the PVC door using a strong adhesive (HeatX by Fevicol, or any other alternative). Enjoy! (Note: This solution can work only if there are no undulations on the peripheral frame of the door) I hope this was helpful.