BZ wrote:

That might be the way I have to go just because the other options would
be so labor-intensive. But my Googling says that this is a
professionals-only technique. I was hoping for a cheaper alternative.

Not any more, assuming you are reasonably capable. I recently came across this:

http://www.tigerfoam.com/index.php

--
"Tell me what I should do, Annie."
"Stay. Here. Forever." - Life On Mars