What is it?
And how do I get rid of it?
A day and a half sit in some Windex got rid of the crome but the yellow junk is still clogging all the details up.
All plastic model "chrome" is applied over a high gloss coating--that's what makes it adhere to the plastic (hopefully), and gives it that high level of "shiny". In most cases, this clear coat can be removed, but only by using a caustic solution--sodium hydroxide, which is also called "lye". If you want to get rid of that, a soaking in anything containing lye (up to and including Lewis Red Devil Lye--which is still avaiable in ANY well-stocked supermarket or big-box store. Lye, also called "caustic soda" was for decades, the most effective paint remover, and it will dissolve the micro-thin aluminum coating we know as model car kit "chrome" in mere minutes.
It does take some "manning up" to use the stuff--what with all the politically correct rhetoric out there, but with proper protective gloves and eye protection, it WORKS! I've been using the stuff for more than 50 years--just maybe I might know something about it?