Hi Jenna,
That seems fine from the view of projection. Blurring does not need to be done there, but it should be okay, too.
I gather you do not plan to do any censoring. That could be included if you wanted it.
It would also be reasonable to have afni_proc.py do these things, which would allow for a quality control HTML report to be generated.
But for just doing a projection and blur, this seems okay.
- rick