There was excessive filler all over the panel that was as deep as 4/5mm deep in places! To speed up the process I used a small screwdriver and hammer to gently chisel away a bulk of it before finishing off with the sander. In the photo below it looks like a microscopic canyon of some kind!
In some places the years of opening, closing and general flexing of the bonnet had caused a few ‘laughter lines’ to appear on the old girl.
I suspect that Gretch had probably suffered a front end shunt at some point in her past because, below the sediment of yet more filler, were an abundance of small dents in a horizontal band that indicated a crude attempt at panel beating!
I have a feeling that as I really get into the stripping process I am likely to discover a multitude of botched repairs. Here is the first which is located on the top right corner of the bonnet (see photo below). Once I become confident with welding and making repair patches from scratch I shall make a far neater job of this area.