One lad I know had it done and his engine wasn't right for a while - water got in a few places. BUT the garage wasn't a proper dealership or anything. I think if you could find a specialised company it might be ok. I quite fancy it
done it loads of times also done it on the rs the weekend as long as you know what to cover up it will be fine or your can use bare bones and wipe very good results also just ask alex about bare bones