Well said goldorak. Like goldorak, I think you should release it as you planned, with the credits going to whoever did the model or paint. I don't think that is wrong. After all it was released to be used in the community for SC. Why not DW?
The only caveat is that if Thomasew, McArm, or anybody else writes to you and directly asks you to not use it, I would follow their wishes respectfully. What a pity that would be though.