Thank you for your advice, Paddy.

Questions:

Am I supposed to remove all hair from the lace and sew it underside or with the hair through the unit so that there is hair around the bald spots instead of two layers of lace (in which case the grids will become visible)?

How do you get the hair to go through the lace (wash the hair from underside but this does not guarantee all hair will go through)?

Have you tried using poly or thin skin?

Sorry for asking so many questions but your comments (or anyone who knows) would be very much appreciated.

Greenery