Reddit mentions of NT Cutter PRO Auto-Lock Stainless Steel Utility Knife (A-1P)

It's really difficult to layer like that when you're starting from a single hunk of foam. You could build it in sections, so the gold parts could probably all be carved separately then glued together at the end. However for the white/blue part I would do a single piece and just tape off sections to paint. Use a Dremel for details and smoothing. I like to use this box knife for carving large chunks and larger details: https://www.amazon.com/NT-Cutter-Auto-Lock-Stainless-Utility/dp/B005J0XDSW

As far as symmetry, it can be pretty difficult, especially with something with organic curves like this gun. Honestly I'd just say take your time and remember you can always take away more but it's hard to put it back. For making things smooth with a dremel go over the area gently with increasing grit level round drum bits until you get the look you want. For the engraved lines, there are pointy dremel bits called diamond point that would be helpful. Trace the lines on the foam and go over them slowly with the pointed bits.

Conventions make me happy. Specifically anime and cosplay cons. There's this instant comraderie that you feel when you step through the doors. Everyone there is a stranger, but seem like friends you've known for years, just out of a shared love for media. For a day or two, there's no sense of time or worry, just enjoyment in the company of those around you.

Here is a carving knife that I would really appreciate. Funny enough, I'd be using it for cosplay.

)

Not really, blade's about 2.5 inches long, maybe 1/2 wide, really thin, useful for cutting meat and cheeses for a quick picnic but not much else. Even cutting through fruit is a push for it.

That's my main use for a knife traveling really, cutting some stuff from the market for lunch on the go.

https://www.amazon.com/NT-Cutter-Auto-Lock-Stainless-Utility/dp/B005J0XDSW/