Sure. Everyone knows this. Why else would anyone wash their car?
Ok. Hate to tell you this, but you have only one real Leica. That's why you can't stop the precipitation. See, the M4P is an M4 with features hacked off; it's not the real thing. So why have it? Exactly. It's worthless, so just throw it away. Now the M6... I bought two of these before I realized they weren't real Leicas like my M3s. First of all, they replaced the excellent, excellent!, and useful self-timer with a battery for some reason - WTF, eh?!? I suppose it's for those red focus confirmation arrows in the viewfinder - which don't work! - and aren't needed because the rangefinder patch is just fine - except it ought to have the depth-of-field notches. Then there's the red dot... Seriously, you can't get sunshine from that.