Play on, even in foul and soaking conditions.
Mechanicals will work anyway, electrics will work as long as the board electronics are not soaked. Gripframes will keep the wet out, some boards have the circuits sealed with silicon, others don't
Hoppers with lids are pretty much immune to rain, and it only gets in when opened to load, speed feeds will let rain in but some have an option for a lid to be fitted - alternately take off the speed feed and replace the lid. Electrics on hoppers could be at risk, but should be shut behind a cover
Some people with tape over the porting on their barrel, and in the us they may use 'rain covers' - but that is a silencer and not a rain conver. It's a euphemism so they don't admit to manufacturing or owning a silencer
If the peak has been removed from your goggles then put it back
But the important thing is the paintball and moisture. Unless the balls are out in the rain they are only absorbing the moisture in the air once the bag has been opened.
If the paintball goes from bag to pot to hopper then it will be fine, don't expect them all to have precise bore matching with the first ball you took out in the morning
