Well with great difficulty is the only answer! get some fine wet and dry paper and gently try sand the edges down then apply a new coat of laquer or 4 till it matches in
it happens really easy on carbon mate, i got carbon on my scoob and it lifts really easy! had a carbon bonnet on my old vectra did that !
Only real way doing it is rub it down and relaquer wtihout damaging the weave
Tuned engines benefit from the PFR7B plug as they are a cooler ignition, The standard 6frb is ok if your not planning on much tuning (and about 15 quid cheaper!)