hello i have bought this razor : pearlex 5/8 dovo, and this type of strop : dovo leather strop (32 cm lenght of the leather)

question:

how much should i strop? (about 17 30 strop before shaving) .

my strop have a canvas part on the bottom...could do me explain the function??

could you me explain the function of the strop paste?? should i maintain full of paste the leather??

many many thanks friend!!!