Nice one
Seeing as you've done nearly all the work on this I made you 'sysop' - sounds dreadful! It means that you can monitor people's changes to the Wiki and have the power to rollback anything that is spam, malicious etc.
I've logged in as Dan Lewis (i.e. non-admin) and made a minor change to the tyre sizes page - just for illustration. If you go to the Recent Changes page you'll see his change listed with a ! next to it. On that line click Diff. If the update is OK then on the bottom-right click "Mark as patrolled".
We can watch the Recent Changes page to kick out spam or vandalism. I'll be watching the recent updates as well so you won't be stuck with checking every edit, we just need to do it between us.
Regarding my second post above, the linking of SMF users with Wiki users seems to be working and like I said elsewhere an editor has to have an SMF account which appears to have halted the spam.
And thanks for the change of name notification. I guess if the original Andrew comes back we'll have to give him his name back
however he hasn't been seen since Nov 07.