Welcome Rindy:
I apologize for the slow answer. We do want to help.
You could use 6mil black polyetheylene plastic for a ceiling in the shop; black is sunlight resistant and won't turn brittle. The walls could be painted with a block filler/primer and finished with latex enamel.
The room also needs some kind of small heat source to keep it dried out in winter and some ventilation in the summer.
Glenn
|