Birchwood Casey Gun Stock Wax, 3 oz.

Q: Is this safe for use on polyurethane finishes?

It has worked well for me on polyurethane varnish!

Q: Would it make sense to use this over tru oil that was applied to a clean walnut stock?

I would not have a problem putting on another coat or two over the existing Tru Oil. If you have any scratches, I would smooth them out with some fine grit wet and dry sand paper, and apply a coat or two just to that area in order to match the existing coat before I coated the whole stock. It is a great product, I use it all of the time.

Q: How long to wait between coats of Gun stock wax?

I used two pieces of old t-shirt. One each for application the polishing. Each application is a thin coat and instantly polish to desired sheen/shine. I used it on my 12ga Winchester, 45/70 Rossi, 22 Marlin and 22 Beeman pcp rifle with excellent results

Q: Can this be used as a sealer after i stain the the wood? I built a longbow and picked out my stain but still deciding on what to seal it with.

the product description say this.. Gun Stock Wax - A high-quality formula combining protective and beautifying qualities of the finest carnauba, beeswax and silicone. Produces a lustrous water repellent film that will not rub off like oils. Offers maximum protection against finish cracking from weather and handling. Enhances and protects the beauty of woods, metals and leather I personally have not used it for the purpose you are referring to although I would think it would be feasible I can not say for sure that it would work although you can contact the manufacturer to be sure before you purchase and use it for that purpose.