protective film/wax on components

Hi everyone,

before i started this thread i have used the search engine but couldn't find what i was looking for.

Can someone tell me how to remove easily the yellow/brown/red protective film or wax from the components? (refer to the picture if you don't know what i mean)

thanks in advance

Mo

https://www.electro-tech-online.com/custompdfs/2011/07/study.pdf
**broken link removed**
http://www.empf.org/empfasis/oct03/3403rcc.htm
**broken link removed**

Thanks Mate

No problem. You just have to know the right name for it.