Will be much easier with snips and either way you're going to have to file it down to make it not look ****.
Unless you have a lot of other stuff you know you're going to need the dremel for then personally I would just save the money. Hell TBH I personally would just use my snips on that rather than my dremel, would be quicker and result in a better pre-filing finish anyway.
For anyone who cares or even hopefully this can save people a few quid if they’re in the same situation. I bought the cheap branded Dremel from amazon:
Along with the Dremel speedclic starter kit (comes with 2 metal cutting discs) and it done the trick brilliantly! Just need to get a file to tidy it up but overall pleased with my purchase and saved £25 or so.
Is your son wearing that outfit?
He's a little short to be a storm trooper isn't he?
/gets coat