every time they have a problem, it is because they used some kind of wax.
There have been so many problems with new guys learning to bed, that I tell them straight out that I will not teach them how to bed unless they use Brownell's spray Accra Release agent.
NONE of the new guys EVER HAVE A PROBLEM when they use this Brownell's product.
I let my guns sit for 3 days before I touch them and in cold weather, 7 days on my kitchen table.
I have used a variety of bedding compounds:
Devcon
Marine Tex
Bisonite
these three are the best
Probably 80% or more of the gunsmiths out there use Marine tex. Marine Corp used to use Bisonite.
I degrease all parts twice with brake cleaner. Then give two coats of the Spray accra release, including chamber and lug recess. When you are finished, the accra release washes off with the brake cleaner, easy and quick. Getting release agent down in the chamber and lug recess is critical, all knooks and cranies in the trigger area, etc. The spray gets in these areas real easy, and also cleans up easy.
A can of accra release cost around $32 and you can bed 10 guns with it, and just forget ANY issue with the action sticking.
So, if you want to dive into bedding your own gun, Marine tex Grey or Devcon, can of brake cleaner, and Brownell's accra release, and you will have zero problems...none!
I can't say that there is anything wrong with JB Weld, and I would not get the quick dry unless I was just bedding the recoil lug.
I have not had great success with plastic stocks in as far as really improving the accuracy with the exception of one Rem sps in 7 mag. I always drill a bunch of 1/8"holes, rough up the surface, degrease with brake cleaner. The epoxy has always stuck to the sides. Problem with plastic stocks is that they are very flexible in the pistol grip, and just in front of the recoil lug. The 7 mag that I had good luck with, I filled the forearm full of 1/4" steel rods, JB weld, and free floated the barrel.
Since plastic stock rifles are usually not a long range rifle, bedding may be a waste of time, stock replacement is advisable if you are wanting to seriously improve your groups.