What time is it? Watches and horology

Some crackers in there.

Just popped into a local watch business to get the quick repair to my Seiko titanium strap and enquired about them also polishing the scratched date bubble. They said they can't fix it because it's glass, only if it's plastic. I've googled and there's a few diy kits, are they worth a shot or try another shop? They're quite a big company by all accounts...