Rust Command::new Windows raw_args - windows

Question

I need to use Start-Process in an exe to call itself so that when called part of the app has elevated permissions. I was using env::current_exe().unwrap(); the problem is that for whatever reason Command is not unescaping the file path when passed to .args(&[...]) Ive found raw_args https://doc.rust-lang.org/std/os/windows/process/trait.CommandExt.html#tymethod.raw_arg in the docs but cant figure out how to call it and don't think it will solve the issue, though could be wrong.
The expected command must look like Start-Process 'C:\path\from\env::current_exe().unwrap()' -Verb RunAs -ArgumentList 'arg1' 'arg2'
Any ideas?
It appears that raw_args :
This trait is sealed: it cannot be implemented outside the standard
library. This is so that future additional methods are not breaking
changes.
Any other ideas??
roughly :
fn call_self(){
let file_path = env::current_exe().unwrap();
let path_str = file_path.as_str().unwrap();
let _ = Command::new("Start-Process")
.args(&[path_str, "-Verb", "RunAs"])
.spawn()
.expect("failed to execute process");
}
call with raw using cargo build
fn call_self() {
use std::os::windows::process::CommandExt;
use std::ffi::OsStr;
// keep getting wrong path so trying this but fails
let mut os_str = OsStr::new("'.\\app.exe' -Verb RunAs");
let mut command = Command::new("Start-Service");
let mut command = CommandExt::raw_arg(&mut command, &mut os_str).spawn().unwrap();
}