Hello Daniel,
According to me, SAP does not propose material or asset type based Best Practices. It is we, making use of SAP objects design the Best Practices to fulfill Our Functional Requirements . Now coming to the idea of Fleet application , I'm sure this is not the case for Fleet Management. As far as application of Refurbishment or Normal PM process is concerned, according to me we can map in both the ways provided all your process requirements satisfy. (But whether your RTPs undergo Refurbishment?) Analyze, ask yourself several whys before going to Refurbishment which is a bit complex than the Normal process. Query being a broader one, obvious that more specifics can not be discussed in one thread.
By RTP, I assumed you are referring to Returnable Transit Packaging Crates. Let's hear to other experts' opinions.
KJogeswaraRao