that's why i only have one sealed can in .22, the other 4 are take down, owner serviceable. centerfire cans don't need cleaning much, so as they don't get used much i just annually clean them with Kroil soak overnight scrub with a bottle brush, blow out with compressor and done.
my one pilot is not a take apart. it is 3 times as heavy as when i bought it. although still as quiet, to my ear.
i've kroiled it for 72 hours and got a lot of crud out, but not all the lead as it is basically welded in there. i'm going to send it off to be jailbroken so it is user friendly.
the dip is great,but man is it dangerous. breath it..bad, get on skin..bad..dump down storm drain..bad, just bad all the way around. but it cleans the **** out of them.
my cheapo harbor freight blasting box and soda or corn cob or crushed walnut hulls cleans very well....just ensure you wear a good mask, goggles and we have these disposable hazmat suits made of paper that i use.
ensure you blast out of the grass and areas where you have pets/kids. whole west side of my house, outside the wall is desert so i have no issue there. blast away.
a piece of aluminum foil in the dip will last about 29 mins before it is gone, so no go on any AL. Iconel and SS and Ti are all good to go in the dip (although that first time putting that expensive as sin titanium can into it makes the pucker factor go through the roof is ugly) but they do come clean.
when the sealed can starts to keyhole or sound like no can at all i'll have it jail broke for $200, the clean it and thread ends with new endcaps, then i'll be good to go again.