Mate, get a selection of majic markers and the Dailer A3 layout sketch book (think that is what it is called, black cover on them).

It is like tracing paper almost and so allows you to work colour in from both sides of the sheet, just like the wonder god that is chip foose!!!

I have some old Magic markers somewhere I am sure, if you pm me your address I will post them out to you as I will never use them.