I think you would have to ask the manufacturer if they could
be resurfaced. Volvo OEM rotors should not be resurfaced (they
say replace them) and they are solid -- so youd'd think they
could be machined. The metallurgy may be the issue.

The solid brake lines sound like a good idea. The brake feel
is a bit spongy (I think). I don't recall if I posted this earlier
but this tool makes bleeding the system a snap (and does the job
well):

http://www.motiveproducts.com/

I think you'll want it if replacing the brake lines to get a really
good fluid flush. If you do use the two-person bleed method of pumping
the brakes I've heard you should be careful not to push the brake
pedal too far down past normal operation position (something
about a seal).

Finally, after replacing the pads they need some time to seat.
The OEM pads take quite a few stops til they get back to having
a strong bite. I just mention this so you don't think something is
amiss after the job is done and the car doesn't stop very well (on
the first few stops I could not even get ABS to engage after my
recent OEM pad change).