lilpossum1 and avabob are all THS the same?
No, because of topography, oil machines, temp, and other conditions not all THS are the same. Even in some houses depending on the day of the week.
lilpossum1 for varying ths and depending on the ball and the line will depend on how much you will keep up with on surface and cleaning ect. Like you mentioned, for you it isn't really as necessary as maybe needed for others. Especially depending on what type of surface finish you maybe using. Let the ball reaction be the deciding factor on when you need to refresh the surface. For difference THS in different places and different bowlers more surface maybe needed for different reasons. How long that surface last will also vary some.
My point in the original post was that it is totally unnecessary on the THS to need any kind of extremely aggressive surface. Truthfully if you can't hook a rock outside the oil line on a house shot your delivery is so flawed that nothing will hook properly. In addition, after watching a lot of bowlers over a lot of years I see 10 guys throwing balls that burn out too early for every one who needs more surface
I disagree. Too many factors for too many bowlers depending on the center, ball, and line they are trying to play. Broad general assumptions in a varying environment as bowling isn't such a great way to think. So if everyone isn;t playing off of the "defined" friction outside they may need different surface to play where they are. Or if they are speed dominant, or whatever may be the case. It will vary. There are few absolutes in bowling, there are plenty of variables.