G'day STriders,
Regarding using the iron-on facility of the Ballarat patch on a leather coat the problem is easily solved - I will use the same contact adhesive that I used on my Aldi m/c boots last time, apply a thin coat to each surface, let cure until glue is no longer sticky but just tacky to touch then apply patch with mild pressure. The contact adhesive I have is weather proof so all probs are solved.