Tapping Rev limiter in auto?

I have a 94 auto and heard that if i sprayed i might tap the rev limiter. My friend has a 01 auto and sprays and hasnt tapped it yet. do i need a window switch or not really, any info is appreciated

You need more than a window switch. You should also have your rev limiter bumped way up, then get an ignition system with the soft touch limiter. You want that stock rev limiter way out of reach. This added safety will save your motor. A freind of mine busted a piston because he hit the rev limiter while spraying, and he had a window switch. The stock limiter is murder when N20 is involved.