As a Native English Speaker I do not think about the Adjective rules I use every day when describing a Noun, for non-native English learners these complexities can be difficult to comprehend to start with.
Though in reality most of the time you do not need to go to this level of description when describing a noun, a “Green French silver whittling knife” or even a “French whittling knife” is going to be understood by an English Speaker.
It is very unusual for more than 3 Adjectives to be in front of a Noun.
Adjectives will be ordered in A, B, C when describing a Noun in English, but not all Groups will necessarily be used to describe a Noun.
Remember you will still be understood without using lots of Adjectives and more importantly when someone is describing a noun to you the most important Adjectives are closest to the Noun.