i'm getting a new bored out gsr block, i'm using my old rollerwave pistons from endyn 84.5, 13:1 compression w/ b20 rods, the pistons have a slight scar on it if you look at the picture

my piston is between normal and too lean, the pistons is not as scared as the too lean one, but it has a slight scar on it... when you rub your fingers over the scars you cannot feel it, i need to take pictures to clarify i bit better, do you guys think i will be still able to use them in my new block???
i'm trying to save some money, b/c i already spent money on pistons and rods...

 

it's possible but some don't recommend it. here's what you can do. take the pistons and block to the machine shop. have them check the cylinders to verify that they are not out of round. have them do the same on the pistons. if there is any variance in the pistons, do not reuse them.