Detroit Toledo & Ironton Question

I'm trying to keep my model railroad as genuine to the time period 1938 to 1948 as possible.
Question: What lettering and or logos did DT&I use on boxcars and
other freight during this time period?
What few pics I've seen from this time frame show no DT&I equipment at all. Your experience and insight on this subject is extremely important to me.
Thanks in advance!!
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