He did this using brushes sometimes as tiny as a single badger hair.

他用油画刷作画，有时油画刷和一根獾毛一样小。

So, using a traditional brush here made out of badger hair, and put some shaving cream up there, and using a traditional razer.

所以，在这里使用用獾毛制成的传统刷子，然后在上面涂上一些剃须膏， 然后使用传统的剃须刀。