I have seen this very same thing happen numerous times. I now put a very small amount of glue on the short fittings that is pressed in, they can still be knocked off with a punch but not so much with normal usage. I have also had pen parts break, esp around the nib when using dissimilar plating.
As for the finish luster that is also a common problem with carry pens. Truth be known is CA's rep is better than the material itself is. Frankly it's quite horrible when it comes to holding up to use/abuse.
Lets look at one 'debonder' for a minute. Acetone.
Acetone is produced and disposed of in the human body through normal metabolic processes. It is normally present in blood and urine. People with diabetes produce it in larger amounts.
Due to the higher energy requirements in pregnant women, nursing mothers and children, they have higher levels of acetone. Ketogenic diets that increase acetone in the body are used to reduce epileptic attacks in infants and children who suffer from recalcitrant refractory epilepsy.
Small amounts of acetone are produced in the body by the decarboxylation of ketone bodies. Certain dietary patterns, including prolonged fasting and high-fat low-carbohydrate dieting, can produce ketosis, in which acetone is formed in body tissue, and certain health conditions, such as alcoholism and diabetes, can produce ketoacidosis, uncontrollable ketosis that leads to a sharp, and potentially fatal, increase in the acidity of the blood. Since it is a byproduct of fermentation, acetone is a byproduct of the distillery industry.
Other things like nail polish remover is a common item that is used. It's not that hard for a carry pen to come into contact with these chemicals. If you want a much superior finish than CA then get some professionally stabilized wood and fine sand it.