As long as the ball isn't in motion and it is on the green, you can mark its position and wait your turn to play.
Play the ball as it lies, you are only allowed to mark and clean your ball when you are on the putting surface (green). You would receive a two shot penalty if you cleaned your ball.
No, you may only mark your ball when it is on the green.
a marker that is flat so a ball can roll over it
yes you can
Yes
No, you may not touch your ball. There should be no need anyway as the name and number are stamped more than once so that no matter how the ball lies you will be able to see if it is yours or not.
No, because you are not allowed to drop a ball on the green. So you would have to play it out of the bunker. And even if you could drop it on the green it isn't rally in the spirit of the game.
Basically, anything flat. Many golfers use a coin.
Not exactly. If his mark would be in your path, he can use any measuring device, (standardly his club length) to make the mark out of your line, and replace it to where it should be before he puts. He has the right to pick up his ball. AlthoughI guess you can always ask!
You can only mark your ball and pick it up when you are on the green. However, if lift clean and place is in play you may pick it up, but that is usually only in the winter.
The opponent is not allowed to go across the net in order to check the mark on a clay court. They must call the mark before they can cross the net.
its not how you mark your ball, its how you mark your titleist.