I'd get someone to help.
On the lower edge you will find the curved contours results l in the film bunching up and you'd find it easier if you can use two hands to stretch the film while someone else heats the film from above.
Watch some YouTube videos, buy some Johnson & Johnson baby shampoo to dilute down as lube in a spray bottle.
Cut a mmm or so past the edge of the lens and tuck in around the edges.
I'm the worst at wrapping and I managed a half decent job, despite forgetting to remove the top protection layer at first then ripping it all off thinking the finish was garbage.
Like I said, if you can see any crazing like in my pic it's worth a shot for a few quid.
But give the lenses a good polish first.
Even if the lenses weren't leaking I'd highly recommend wrapping them to prevent clouding returning after polishing cloudy oxidation away.