Brock, you just figured out the truth. Polished surfaces are great when you start out on the line with a torque converter allowing a stall of 3000rpm and above. This is not what a person does on a daily basis, unless your friends are the local law enforcement and can get away with it. One reason so many people have a negative perception of ported and polished heads for street engines is because the fuel sticks to smooth surfaces and the air keeps going, after a time the engine carbons up and that's why you see so much excess revving to "clean out the carbon" because of the fuel that has baked and stuck to the surface start catching even more fuel and then it just gets worse, essentially washing the port surface from the excess coking fuel to make her run better. Now comes the fun part. I have seen guys use sandpaper rolls of 60 grit. This makes deep scratches and rings around the port surface, and the problem is, it is going the wrong direction, kind of like panning for fuel. If you culd get them to go the direction of the flow it would be a different story, but you can't. Discovered a long time ago, as you noted above from an earlier post of mine, carbide burr cutters leave little chips and thiny, almost invisible dimples in the surface. As it turns out, this keeps the fuel from sticking to the port surfaces at very low air flow speeds, so the fuel remains suspended. Couple months back I had to remove the intake manifold on my 02 PT Cruiser for a leaking thermostat housing. Somehow I managed to drop one of the bolt into the bottom half of the intake (it is a two piece unit), so I had to pull the bottom half off to get the bolt out, it was too deep for the grippers and fat fingers I have. Back in 2005, with 34,000miles, I ported the head on this engine, never took it apart except for a timing belt, but no change in anything with the head. I did this at 105,000miles and I got to look at what the ports looked like. When I ported the head the ports were black and mild crud inside the ports, maybe .020 thick and a little greasy from the PCV valve fumes that get sucked into the ports. All the heads look this way, I had purchased a head with 45,000miles on it, looked the same. When I looked into the head and it was just as shiny as when I ported the head except for the two outside sides of the port. In looking at the flow, the entrance to the port is narrower than the outside, which slightly flares outward to the ports, which is expected given the shape, nothing can be done about it without widening the port at the intake manifold, and the intake manifold. the thing was, the dirty part was about the size of a pecan half on either side, the rest was spotless. I have seen ported and polished heads that looked like stock heads after 2000 miles, mine had 71,000 miles on it and I could see 80-90 percent of the chips in the surface from my carbide burr cutter still. To your 906 head, as I said, don't use sandpaper rolls that are rougher, it will act the same way as a supposed professionally polished head, it has to be the burr cutter. The key is the little cupping thing the burr cutter does, it gives the surface tension to keep the fuel suspended in the air.