I just bought a couple of those plastic (acrylic, I think) panels that are
used for gluing over old tile or backerboard to create a new clean look for
a shower.

These panels are 36" by 80" and flexible enough to roll for transport.

I will need to cut these panels to fit to the size of thes shower and
also the holes for the control valve and shower nozzle.

The guy at Home Hardware said they could be cut with a utility knife.
Does anyone have experience with these? Can they be cut this way or do I
need a special tool to do the job ?

Also, the panels will extend over top of the tiles. What's the best
material for shimming that section up?

And one last question. Do I need to prime the tiles? If so, what type of
primer would I use?

Thanks,

Larry