Paint the knots!!!!?? why don't you try this and let us know.
No shedding? where did you read that BS? Yes it is stronger than Human Hair, but it can break, frizzel and shed.
The style needs to be put into the unit by someone experienced with working synthetic fibre and cannot be changed easily by the customer at home.
Synthetic hair is not recommended for extended attachment, showering with it on, a NO NO, sleeping with it on, a NO NO, you can't use a hair dryer on it, a NO NO, a blast of heat from peeking in the oven will frizzel it, a NO NO.
But! it can be a great product if and when it is used for the proper application and customer.