These are done from left to right, top to bottom, using special plastic pens, with different thickness and colours. Working in day light is an advantage to detect details. Shade and mirrors are manipulated to reveal scratches and improve tracing conditions. There was no need for artificial light. This technique gives the most accurate copy of the engraved surface, even though it takes less information on the plastic sheets.
Result are cheaper and faster to achieve without loss of resolution.
Above all, this method solved the overlapping engravings problems found on the first panel of Vermelhosa site. The employment of these methods at the same site brought up important issues. The explanation given by these haven't always matched the expectations of local people and common visitors. Some questions are yet to be answered. There is, however, a need to make this finding understood and so admired by common visitors.