My plan is to use:
[[http://item.mobileweb.ebay.co.uk/viewitem?index=0&sbk=1&nav=SEARCH&itemId=271108749377 This material on the room-facing side.
Blackout material on the window-facing side - but should I use black or white? Would white help to stop the room heating up in summer?
These suction cups.
I'm not super-experienced, but I can sew by hand. Alternatively, I could use my new unused sewing machine.
Is this a terrible idea?