I have the same boat as you and I
completely stripped down, cleaned and re-lubed every single winch (6 of the them) on the boat. I have Lewmar 15 single-speed on either side of gangway on top, two Barient 2-speed and 2 Lewmar 16 single-speed located along the sides of the cockpit.
I was very concerned about how to go about this and that it would be very daunting. I researched a lot of You-Tube videos and then tackled the job.
It was extremely simple and not complicated. I removed every single gear, pawl and spring. I used varsol to clean every single cog and made sure everything was spotless, then used Harken winch grease (which, by the way you need very little -- don't over-lube as this is what picks up the dirt) on each of the gears and used standard engine oil (1 drop only) on each pawl.
The only issue I had was an annoyance with the design of the Lewmar 16 single-speed winch at the rear. The 'balloons' designed it in such a manner that in order to remove the main gear, you have to completely remove the base from the top of cockpit. This required removing the nuts under the base which are located in the aft cabin. Doable -- but friggin' annoying.
Also, I found a number of broken springs which are easy to order and as well, you will need to find the wrench (mine was plastic) that holds the mechanism while you loosen/tighten the screw holding the winch in place at the top.
Here are some pics I took -- if I can help in any way, let me know as I just did all of this 3 months ago

Rob