What's the plural form of grattage? Here's the word you're looking for.
Answer
The noun grattage can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be grattage.
However, in more specific contexts, the plural form can also be grattages e.g. in reference to various types of grattages
or a collection of grattages.
Examples
These same forest images appeared when he adapted his frottage technique to the roughly rubbed and scratched painting techniques of grattage.