Sure, there are a handful of options available to trim up wood veneer edges. But the easiest way is to use a purpose-made tool: a veneer trimmer. This little $7 plastic trimmer slices veneer flush in both directions and can accommodate most edging thicknesses up to 3 mm.
They’re simple and cheap, but provide a nice clean way to get edges looking good without extra hassle. It’s not a flashy rig but it might be better than trusting your hand to a razor knife and a straight edge — and it’s faster, too.