I made a set for my 1939 Chevy 4-door sedan and 1951 Chevy Fleetline from thin sheet styrene. The problem with using thin sheet styrene is that the blinds bow and looks off. It's something that I am going to have to figure out.
In my area the oldest hobby shop would be Sheldon's Hobbies. They specialize in R/C cars but they carry a decent inventory of model car kits and finishing supplies. They have been in business since the late 1950's. Last October the other long time hobby shop, D&J Hobby closed up for good after 30 plus years in business.
Last year I used Alclad on a set of valve covers. I used Testors enamel gloss black as a base and allowed it to cure for at least a week. I then airbrushed Alclad in thin coats at a low air pressure. You need to check the progress after each coat until you reached the finish you want. Once it seems to look like chrome, stop. Any more coats will ruin the chrome finish. You might be tempted to add another coat to make it more like kit chrome but don't. This process takes a while. Take your time and don't rush it. I was surprised that it took me 30-45 minutes to paint a set of valve covers. You need to remember that the best Alclad finish will never be as good as kit chrome.