The Magna series shares it's engine with the first-gen VF700/750 Interceptor but beyond that they're different animals.
The mechanical checks are well underway and as part of the valve clearance procedure the alternator cover is removed. Good time to refurbish it.
This is labor intensive work but time and effort will leave you with a very presentable piece. Machine buffing will give these polished aluminum bits a shine to rival chrome, but the original finish wasn't quite that dramatic. To achieve the right sheen, I wet sand the buffed piece with 2000-grit paper followed by a single hand polish with Mother's aluminum polish. Next up, valve covers.