My standard process for evaluating items in the VLQ queue is basically:
1) If it's spam, rude, etc. then delete it.
2) If it's not an answer and there's very little content, comment and delete.
3) If it is at least an attempt at an possible answer, then try and salvage it.
3a) If it's not an answer, but someone has put a lot of work into it, try to get them to convert it to its own question, or adapt it appropriately.
(Being used to higher-volume sites, where a lot more junk comes in, I don't normally flag for moderator attention to convert a comment-as-answer to a comment. If the mods here wish, I can do that here.)
Mostly trying to salvage a potential answer - at least initially - consists of leaving a comment trying to suggest how the answer could/should be improved. Include a summary of the link, add the reason for a suggestion, provide a source for a fact, those kinds of things.
If the primary problem is spelling, images added as a link, formatting or ALL CAPS, I'll usually just edit and fix that.