These involved the principle/nose landing equipment doorways, egress/ingress flight crew side hatches, RCS thrusters, mid-fuselage vent doorways plus the payload bay doors. The RCS fairings were made from Inconel®. There's a variety of uses for each diverse style of surface conditioning disc. In general, They're all made up of an https://www.facebook.com/permalink.php?story_fbid=pfbid021JyZtPyQjLnRWtng4vnY7x3o7vVQdvqv2LX6tUR2oPbGfMyVwxW1wCoGXBy9QDQPl&id=61562415773754&__cft__[0]=AZU0k7bR2tPjRV7P7aGLFzk6y8r8rXyTHHXwLmqLdPQF6d1GXwwU9TJIpBv6dAn5RZ1VllcpNLvsKHfE7IHBgnzDhsxQbrpmKksE0ALvqCdDD0d0IVBBuOPBdcRmVne239RonUyrrfroXZHCNRxlHLGlB32blSUkAq3W41PDbFhRhmMijEjtONO6hbYTJ2ief5kg1filbDVzccXQxIJ-pJn5&__tn__=%2CO%2CP-R