Painting the Observatory
Once I had installed the Plywood panels, I needed to paint the walls. I was worried to begin with whether I required a grey undercoat or if I could just paint on a black one-coat paint, or should I go for the blackboard paint which is non-reflective.
In the end I purchased two tins of black paint from Wilkinsons which were about £6 each, and they were for wood and metal, (quite handy the paint went on metal as I also painted over the screws in the walls as well).
The paint hardly soaked in at all, and one coat was enough. The paint was very good and quite cheap, plus it was water based so brushes wash out easily as well.