Although these chisels are not meant to be used on steel (roofing ones for lead flashing) they are quite useful - especially as they tend not to leave marks
Another handy tool to have is a set of these hand folding pliers
As before the reason for making the dent from the flat sheet first and then folding helps to make sure I'm not as likely to have to hammer so hard - easier on the old joints and also less likely to end up ripping the steel (if I get too enthusiastic)
Flipped round for some unknown reason - I should have adjusted that picture - doh =>
Quick comparison - need to make a curved corner on the lower right hand side...
...and then smooth out the lower parts.
Not all of this panel will be used - in fact most of it will be cut away as I want to preserve as much of the original structure as possible
(To be continued)