The SD footage...was shot...with the DV
What is the standard workflow for prepping SD footage to work in an HD timeline like this?
Well, one workflow is to do, just as you have done. However, Scaling can be a real "deal-breaker."
Many users have employed plug-ins, and programs, such as Red Giant's Magic Bullet Instant HD, though some, upon testing it, did not feel that it did the ultimate job.
Not sure about the Mac platform, or how well (or poorly), it might do with your footage. They have a trial, and if there IS a Mac version, I would test, and see how things go.
I did indeed look at Instant HD briefly, but wasn't interested. And in this case Scaling wasn't a deal breaker.
Got you. Several users felt, just as you did. I assume that there are several variables at play, such as the actual Source Footage, and also what the editor (or perhaps client) considers acceptable.
Thank you for reporting, and I just wanted to throw that out, but you have already "been there - done that - and have the tee-shirt to prove it."
Appreciated, and good luck. Hope that others have some useful ideas for you.