Yes, it is surprising how well all those postcards arrive, no matter if they are on regular RC paper, on Ilford postcard paper (which is I think Ilford Gallery paper which has a bit thinker paper base), FB, cyanotypes, Polaroids, even the very small Fuji Instax postcards arrived well. And - it is a postcard exchange, so a bit of wear should be part of the fun

Cheers
Ruediger