If I exchange my funds in GBP into PLN and then request bank transfer to my bank account abroad which is in PLN will I get charge?
Are you going to send PLN from Revolut to Polish bank (PLN account)?
If yes- it should be free (I’ve sent money in that way to a few Polish banks 
)
But don’t forget exchanging funds during weekend = poorer rate
Yes, My revolut account is in pounds and was told if I send pounds to bank in Poland I will get charge for swift transfer. So I thought how about if I change pounds to polish currency first and then send them over to the bank there.
As I’ve written above- it should be free. I’ve made it and it was