Having brought people here [VdC],
John Brierley offers no suggestions as to how to hack one's way over to the Caminho Central again. However, it's easy enough. One turns right off the main drag [N 13] onto the Rua da Lapa, and then it's a straight run into Touguinha, five or six kilometres to the north-east. In Touguinha village, after turning right and crossing the river, there are enough yellow arrows to make navigation without a map easy until one rejoins the main trail at the village of Arcos....
The road between Vila do Conde and Arcos is narrow, mostly cobbled, and surprisingly busy. On most of it there's no footpath or shoulder, and it can be extremely hazardous. I was nearly squashed as flat as a flounder against a high stone wall by the tail of a 'bus coming at speed around a blind bend. The one advantage of the cobblestoned surface is that it makes it easier to hear traffic you can't see. Great caution is necessary for the pedestrian, especially when approaching a bend to the left.