Can I use a comb after using hair fibres?
You definitely can without any concerns, but just be careful.
The only thing you can look out for is to use a comb with wide teeth.
You can even use your hands to loosely style or put your hair into place by patting them. Here are a few videos to show you how you can use a comb to style your hair using 20 Alpha. You can get the best results if you get your hair dried and styled before applying 20 Alpha.