Keeping the tractor looking is great, in the past people have restored old models. I found some information that I am hoping will help you. I added a link below to Sears Parts Direct. Are parts department should be able to help locate the paint for you. I do hope this will assist you until your expert answers your question. It may take 24-48 hours.
The chart below shows the paint color information for the various Craftsman tractors. You probably need the LTX red for that tractor that you have. The paint code is provided. There is also a part number for each type of paint that you can order from the
This should be the information that you need to touch up the paint on that tractor. If you need more assistance, let us know.