Strangebird,
As I wrote
here Cessna appears to have "borrowed" paint colors from contemporary automobiles. On the 1955 C-170B Autumn Rust and Trooper Tan were interior trim colors. I think someone in Cessna's design department must have owned a Nash as both of those colors are found on the 1952 Nash.

- 1952 Nash
Vintage Paint has a good selection of paint colors chips with names which match what is found in the C-170 IPC paint code charts. Here's a sample:

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They offer the paint in a wide variety of mixes as seen here:

- Screen Shot 2023-02-09 at 10.31.07 AM.png (76.45 KiB) Viewed 850 times
Alternatively, you might consider buying a paint color chart for a 1952 Nash such as
this one and then having a local auto paint store scan the chip and mix up an spray can of Trooper Tan for you. It would be a lot cheaper than paying hazmat shipping charges for a spray can online.