There's a couple of reasons for that. First, MDF in my opinion is great for mastering a pattern, but not good for creating a final product. If I dropped it, it could get ding'd pretty badly. Second, there are some details that I could not include in the master BECAUSE it's MDF. There are some scoring marks, some vents, drilling, and other stuff that if I tried to cut those into the MDF, it would not be clean. I can get much better scribe lines and such out of resin.
Third, who is to say I don't want more than one for myself? I was thinking I might do a semi-rigid foam casting for custuming, maybe keep one in the batmobile, etc. I may also do a couple build ups as gifts, to trusted friends and costumers.
Fourth, in general, I find resin much easier to work with than MDF. It's more forgiving, etc.
Speaking of the batmobile, the entire cost of this project is barely a blip on the radar when considered within the context of my other "on the bench" projects. Spending 50 bucks on rubber and resin is a rounding error in the overall project :lol
All really great questions, and I appreciate the dialog! Keep em comin'!