Man, I love these threads. I wish I wasn't at work, so I could post an even longer response. I swear this is mostly on-topic...
If you want to keep stuff from being recast, don't sell it.
I believe you can recast soft goods as well by copying patterns of a sold soft good part. That's just as bad as dipping something in silicone. The same concerns I have of releasing a fabric part are the same ones I have for a resin piece.
It's disappointing to see members go in the direction of "my contribution to the community will be copied or otherwise re-purposed, maybe *gasp* without due credit to me, so I shouldn't contribute at all". I guess I have a bigger issue with the philosophy under which a lot of hardware parts are offered on TDH, in contrast to the way other useful contributions are made here.
Why do folks like wizardofflight contribute incredibly comprehensive armor and helmet templates? Why have I spent several weekends drawing ESB paint scratch templates? Why do people post helpful tips and techniques in progress threads? For example:
http://www.thedentedhelmet.com/showthread.php?t=13420
We do it so that TDH members can expand their skill base and multiply their talents. And so we can all make great costumes!
I don't have the time or the space to do sculpting or mold making (though I studied it in college), so I try to contribute to the SW fan community in other ways where I am capable. I'm generally against the idea of someone not receiving credit where it's due. However, people here should remember that the ultimate goal is that everyone here gets to make progress on their costumes, and everybody has the best resources to do so.
I'd rather see folks who make a hardware part here encourage other members to pick up the manufacture later. I'd rather see 30 people making aluminum parts, 30 people making armor and helmets, 30 people making soft parts, etc. based off of the best reference designs. Users like WOF (for example) enable that kind of propagation of ideas and skill.
Anyway, that's my 2 cents. I'll go back to drawing decals and fabric patterns and will continue posting what I make for everyone to use.