No worries,mate - was going to polish the transmission case on a little Zip 50 4t i bought,as a backup/backup bike,but decided after taking off that 'otherwordly' pug ugly white paint it had on it and giving it a light buff/it was a little too bling for my age an the bike...an decided to black it instead.Mk.
No problem polishing them piaggio engine case is long a hard work as they come out as standard really grainy so loads of sanding prior polishing And dremel is great for small surfaces you would have needed something a bit bigger to do the big area Ride safe