ive just re sprayed my 4i in Strato Silver, once i put the laquer on i noticed a small reaction on one of the rear wings.

i rubbed it back down and used primer filler but the reaction was still showing, so i rubbed it back further onto the original filler over my welds when replacing the rear arch.

the reaction is still there so i put a skim of fine Surface filler over the top hoping to seal it in, but its still there the moment i put primer filler over the top.

has anyone got any ideas how i can get rid of it as ive got to have the car out of the workshop by next friday and im stumpped.

cheers