Thanks again Yes this piece has a slightly more rough and raw approach to it. I'd agree with you there. The correction pens I use are Pentel Micro correct. I get them for free cos my dad gets me boxes from work He works as an engineer on a ship yard and they are used to write notes on all sorts of surfaces from plastic to steel. But I think they are pretty cheap to buy.
I always get a reaction when I state that I use them in my paintings, but I'm yet to find anything that gives such a clean opaque line with minimum fuss.