Good Job...
-but-
Loks like a fan would be a good idea, too. Will help make the stems stronger and more able to support the weight of the buds, when they bulk-up. It might make your tin-foil a bit noisy, tho. (I'd rather have just the plain wall than to cover it with tin foil, just because foil and Mylar get's all messed-up when you foliar spray.) A good coat of waterproof flat-white paint, you'd be good to go.