umi000
New member
In theory CeriGlass should out perform M105 because of the abrasives used in it. CeriGlass uses cerium oxide, which is super duper hard and super duper aggressive. Cerium oxide can be used to correct wiper scratches and marks out of glass (although IME this requires a rotary polisher and a fair amount of pressure).
That said if you are having luck removing water spots with M105 you don't need to switch. M105 will be less aggressive, but it is good to start with the least aggressive product first.
One of a few times you'll hear M105 being referred to as the "least aggresive" option
