[tomcarman]

What a great car! As Deuce Roadsters says I would do as little as possible and keep it as is. Cleaning the upholstery could be tricky as it may want to come apart. !st thing I'd try is to gently blow the dust out with compressed air from a distance, maybe 30psi to start. At least get the dust off. Not sure about the stains as water and chemicals could do further damage. I'm sure Kube will chime in. He's an expert.