Hi,
Yes the suction stick is the way to go. Any good motor factors should sell you the stick along with a pot or two of cutting compound (usually one courser and one fine) Just be careful around the seats if you are porting the head yourself as a little score with the porting tool can take ages to take out with the cutting compound.

Also if you have the time try to round off the lip on the valves at the edges of the seat area. I find this can add almost as much power as the headwork itself. I put valves in a pillar drill which makes it nice and simple.

And port the head, dont polish it. Its a generic term which can be a bit misleading. you want a smooth finish but not shiney or fuel will drop out of your air fuel mix and beed on the shiny surface. I normally finish off ports with an 80 grit flappy wheel which leaves the desired finish. Also as you are turboing your engine make sure all sharp edges are removed (rounded off) from the combustion area or you will get hot spots glowing which can cause detonation which will soon destroy all of your hard work.

Hopefully some of that helps.

Rob