Jumping back into this for a minute.
Long Range Hunting/Shooting implies a few things to most folks.
For me I'm struck with visions of a guy dilligently loading his ammunition to exacting specifications that commercial ammo can only dream about. I see things done with methodical precision and purpose. The rifle used for this game being the epitome of taking a past time seriously.
All that precision, preparation, and effort devoted to everything else yet white lithium grease and shoe polish are acceptable as a mold release for a precision casting?
I don't mean to pick at anyone in particular as this has been an accepted and standard practice for a very long time. It's just always baffled me to one degree or another. I guess lets start from the beginning. Just what is bedding exactly supposed to do? My experience has shown me that it's a tension free precision casting of where/how an action nests in a gun stock. It's sole purpose is to provide maximum surface contact for the transmission of recoil while still being inert to ambient conditions.
Bedding will not make a pigs ear a silk purse. A gun that sucks is still going to suck after it's been bedded. However a great gun will become exceptional, and so on.
In precision manufacturing with CNC's, aerospace, etc the use of molds is quite common. Parts that are precision cast use a commercially made mold release agent. It's usually silicone based and in an aerosol form so that coverage is an even, thin film. This is for a couple of reasons, one is so you can get the slug out of the mold and two so that surface finish is preserved/transfered to whatever is being cast.
I enjoy bedding rifles and I take a great personal pride in it. I've devoted a tremendous amount of time developing a process that yields results that are quite good on all fronts. I don't say this to beat my chest so much as to encourage others who want to take this on to approach it as something more than a "well it's good enough and no one sees it anyway" kind of mentality. One of the greatest rewards for me as a gunmaker is taking a rifle apart in front of a customer and seeing their eyes get big because the gun looks as nice disassembled as it does all together.
Commercial mold release agents are available from industrial supply vendors like MSC, McMaster Carr, and many others. An aerosol can will last a very long time. The surface finishes will greatly improve. no more smeared brush marks or swirly stains "water marks" in the resin when it cures.
Here's a sample or two:
All the best,