55.2-59 Wont start

[popeyestruck]

Been sanding and buffing my new paint for the last month a few hours a day. The worst possible job. I dont know how anyone would want to do this for a living. My arthritis in my wrists is killing me. Anyway , Truck was running great when I parked it but now turn the key press the floor start and nothing. No click , nothing. I have power to radio , lights etc but wont start . Battery is at 12.6 volts. Any idea what I should check? I have a couple more days of buffing and then I'd like to take it for its first drive