It won't work as well as a PI, multi freak, FBS or BBS might work a bit better too but there are many posts and threads out there that have settings that worked for owners that had single frequency Fishers at the beach on many different forums including here.
A hunter named tinfoil came up with some settings many have used that say work, others use different settings in disc and and still seem to find the goods.
Google..."tinfoil, settings, beach, F75", and see what pops up.
His setting advice is.. all metal, threshold -1, frequency 7 and manual ground balance of 6-0 on wet sand.
Dig everything over 15 with a zip zip sound, ignore the wah wah sounding targets.
The F75, F70/Patriot all have the ability to balance down to salt...The T2 might also since they are built on the same core engine.
This is a feature added to the programming, not just a hack.
Not the most optimum tools for beach hunting but they do seem to have some decent abilities in salt if you set them correctly.