Quoted from ChadNC:Perhaps im in the minority here but im not sure why people are installing cliffys on new or HuO pins?
As others have said, it depends. First off, you never want to install any scoop protector on a game straight out of the box. Play at least 50 games first to both check for issues and to play the game as the designer intended. Scoop protectors always make the shot harder (smaller). No denying that. You may not notice it, but it does. Switching to white rubbers right out of the box is also a bad idea. You're completely changing the game without experiencing what the designer intended.
If the game is new to you, but has been out for a few months, try to find one on location to see how it's holding up. Places like the PHOF, PPM, PAPA, and others are great places to do research. If it's the latest and greatest, play a few games and keep a close eye on areas that might need protection. With older games, it can vary greatly. The scoop on an original AFM playfield absolutely needs a protector. Every last one of them. The slot machine scoop on TZ often doesn't need one. The rat hole on BSD is another that tends to hold up well over the years. Again, check a location machine before plastering the game with protectors.
Whether you use them or not, putting them on right out of the box is a bad idea. A few dozen plays without protection won't destroy your game. Sort out the bugs and get a feel for which areas might need protection before you decide. For the record, I use Cliffy's products on some of my location games. They are an invaluable tool when used judiciously.