Currently, arrows and bolts have both the Wood and the Steel types, allowing the special materials modifications that allow them to bypass damage reductions (i.e. adamantine, alchemical silver, and cold iron). But, darts, javelins and the spears do not, having just the Wood type. So, the Steel type could be added to darts and the spears.
If the concern, though, is not to have the weight reduction of mithral, perhaps the MITHRAL_ITEM equipmod could have a qualifier like "BONUS:EQM|WEIGHTDIV|2|TYPE=Enhancement.REPLACE|!PRETYPE=Wood" to exclude those items that are partly or mostly made of wood? [Edit: This part doesn't work, unfortunately, since adding the Mithral type replaces both the Wood and the Steel types. Hmmm.]
This is a clone because it should also be done in Pathfinder.
Completed: At revision: 20885
... which was probably jumping the gun - I did it at the same time at the 3.5 revisions, which were approved.
I've only worked with 3.5 up to this point, but should a clone be made for 3e, too?
I’m not sure I should have cloned it in fact, maybe just changed the components and commented.
Yeah, component would have been better. Saves a Chimp from having to come along and push it down the workflow again.