I had a lot of practise with all types of paints during art school days before using them on plastic models. These experimentations gave me an insight to each of the mediums properties and whether they were compatable to each other and surfaces.
I guess the only way to find out is to try on scrap plastic until it becomes familiar. I found that this learning process made the hobby that more interesting. The ready made stuff are similar to what old modelers have been using but have now gotten names like pigments, washes, filters, streaking effect, dust, mud, chipping, fuel stains, rusts and so on.
What an adventure you're gonna have.
Cheers,
Richard