I would like to freshen up my shock. Can I use fox float oil?
Do you mean the Fox Float Fluid? Then yes should be OK. This is simply a lubrication oil used on the foam rings and seals to reduce friction and keep your fork / shock nice and supple.
If you mean Fox suspension oil then you will have to check with the manual to see what specification oil is required in your shock and compare that with the specification of the Fox suspension oil. The suspension oil is used by the compression and rebound damping circuits so if the oil changes so will the damper performance.
Ye I do mean the lube.
Any idea how to get the air can off
no idea on your shock but usually its threaded on so just twist and unscrew it.
Air can pulls off. Very easy on these.
Let all the air out, then remove the o-ring at the top, then the air-can slides off.