Not sure if this was reported before.
I just found this while I was researching online for any Black Widow Iron Man 2 version Hot Toys figure costume cracks/peel/disintegrate.
I remember I saw a cracked costume once, but can't find it again.
Anyhow, I found this Chinese article.
Apparently when The Dark Knight Batman DX figure was first released.
Hot Toys in a Chinese statement to customers clarified that it was not because of the materials they used for making the Batman costumes.
各位DX Batman顾客: 我们已收到大家近日对部份DX Batman的质量问题之意见及关注,我司经过详细翻查检验,发现第一批部份衣服脱油原因,是因为在底油上色工序时喷油过厚,而导致表层油漆出现容易刮花/ 脱油的情形,与蝙蝠衣采用之物料并无关系。 本司已立刻作出更正及覆检,重申同类事件只在少量的第一批货品中出现,而并非所有产品都有同类情况发生。对于第二批产品,我们已加紧进行质量监控及多次测试,以确保产品的水平,尽量避免同类事件再次发生。 对于每件产品,我们都希望能做到尽善尽美,因为Hot Toys之产品生产程序非常繁复,是次在个别生产过程及品检中出现问题,我们已实时作出认真检讨,并对受影响之顾客表示歉意。就这次事件,我们会弹性处理换件服务,延长换件之期限,以弥补对有问题之顾客做成之不便,并以积极及负责任之态度处理是次问题。 如有任何查询,欢迎致电到2388 4677或带同有效发票亲临玩具狂热门市,我们职员会为您提供换件服务。不便之处,敬请原谅!
In the released statement above, they said that it was because when they were applying the base paint(底油) coloring process, the spraying of oil was excessive (喷油过厚). This caused the oozing of oily substance from the suit. They emphasized this has nothing to do with the choice of materials/ingredients used for making the suit.
Source:
http://bilirenou.abang.com/od/basic/a/batman.--DS.htm