The grab rail is a pain to re-veneer.
First of all, I did not attempt to re-veneer the front facing section as that was just too much. I prepared this and used yacht varnish.
After a few goes at the side which faces the driver, I worked out that the veneer needed to be cut to shape at the ends. This entailed long triangular sections being cut out and then glued and pressed. As I am no expert and was learning on the job, the results are not great but passable as a first attempt.
There is always going to be small gaps once the press comes into action. There is also some overlapping in places. To finish these, I sanded down the overlapping sections until only one layer was present. For any gaps, I sanded down some veneer to create powdered wood, mixed these with clear glue and used it as cement to fill in the gaps.
The two part epoxy with a final finish of yacht varnish means it doesn't look bad. Not perfect but I learned a lot doing it.