Originally Posted by
SoSmellyAir
The chain (including the quick link) was then cleaned by immersion and shaking in acetone 4 times, including an immersion overnight,
Acetone isn't sufficient to strip all the grease, as others have said you need to use a different solvent first. Since you can't get oderless mineral spirits in CA, as others have mentioned use simple green or other degreaser but do not soak overnight, do 3 agitations, rinse fully with plain water, then do the acetone baths or alcohol.