All sculpture lubrication should be done as needed or every couple years, although I have sculptures in my yard I haven’t touched in many years. Use a silicone spray lubricant such as triflow.
For all in ground sculptures that are on a brown or green rod. Take the sculpture off of the pole and turn the sculpture upside down. Spray silicone spray down the open end of the copper pipe. Spray enough that you think it reaches the bottom of where the bearing is. Let it sit for a minute and then turn it back over and let the excess silicone spray go into the garbage. Place sculpture back on the pole. It is ok for the excess silicone spray to cover the pole. Just make sure the excess silicone spray doesn't get on anything you don't want it to get on.
For the hanging sculptures I do the same process. Take your hanging sculpture down. Turn it upside down and spray silicone spray in the open end of the pipe. In hanging sculptures with rocks you just spray around the wire that is in the open end of the pipe. Spray enough so you think it gets to the bottom where the bearing is. Wait a minute and then turn it over and dump excess silicone in the garbage. Be careful, excess silicone will come out the top and bottom. Wipe any excess silicone off. Hang your sculpture back up. Be careful that any excess silicone doesn't drip on anything that you don't want it to when you re hang it.
On the bottom bearing on the large in ground ones (brown poles) I put a little lithium grease in it but you can use Triflow also. If you use lithium grease just put a bit on your pinkie finger and coat the bearing on the inside.
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