I wouldn`t put in in the wash bucket no matter what anybody says

Good luck if you try it, hope it doesn`t bite anybody.
I still use it, while recognizing its limitations, and I *always* top it with something durable. Always.
I only find it hard to buff off if I botch it up by letting it flash off before the buffing

That "don`t let it dry" and using a slightly damp applicator are pretty important IME.
And FWIW, mine is *OLD*, like...it was old before we moved here in 2000. Lumps of...[stuff]..some [crap] that looks like mold...really nasty! But it works 100% fine, just as well as it did when new. So I sure wouldn`t let its shelflife bother me, not at all. (I can`t remember when I bought my Klasse twins! Maybe the early `90s...I`m still on my first little jug of KSG with plenty left despite always layering it at least 4X and using it on *BIG* vehicles for years, still works fine on my exterior plastics. One ounce is far more than I ever needed for one coat on a Suburban, including the jambs.)
EDIT: another FWIW, KSG is the *ONLY* conventional LSP that`s ever protected against marring, and it did have at least 6 layers on the area in question. I *saw* what happened, and it should`ve marred that paint badly, but it didn`t. Not at all. NEVER had any other LSP provide a physical barrier-style protection against anything like that in all the decades I`ve done this stuff...never. Because of this, I use it on all "piano-finish" black exterior plastics and it helps keep them marring-free. It`s not a Coating, but it can be quite a, uhm...build-film.