setting timing on the gizzer

so i wanted to double check the timing on the teg, it started gettin a real bad hesitation, and after a complete tune up i was told to check the timing to see what its at. well, how does one check the timing on the car, when the timing marks are all worn off?

Timing marks on both the cam gears, crank pulley and the timing belt cover are worn off?

na just on the crank pulley. i was tryin to set the timing according to the crank pulley and the timing mark on the cover

let me rephrase that, i was using a timing light to check the timing, i didnt pull anything apart to check cam gear placement