About the only thing to avoid is anything with silicone in it because there a risk of getting it on the wood and spoiling the finish.
Bostic Glide Coat is nice to use. It used to be called Top Coat, I think, by Textron. Spray it on, let it dry, polish it in.
For a planer, I'll use smeared on paraffin between coats of Top Coat (I've still got a can or two).
Takes very little paraffin. Usually about a couple spoons full (shaved) to a bottle of MS. Too much paraffin, and it will harden in sprayer of bottle. Also needs to be kept where it's warm, above 50 degrees F.What is your ratio of paraffin to spirits? Or do you just wing it?
Thanks