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BLO, PTO What's the difference? Pics if possible.

This is a discussion on BLO, PTO What's the difference? Pics if possible. within the Stock forums, part of the Rifle Forum category; Originally Posted by Duce Not sure if I'd trust that chart. Only has up to three coats. All the stocks I've worked with using PTO ...


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Old January 29th, 2017, 03:07 PM   #16
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Originally Posted by Duce View Post
Not sure if I'd trust that chart. Only has up to three coats. All the stocks I've worked with using PTO or BLO have many more coats than that. Once cured, water rolls right off them. Granted, I haven't taken them into any SE Asia jungles, but PTO/BLO does offer more than "zero" protection.
You're thinking liquid water - the test is of humidity moving into and out of wood. Have any doors or drawers that are painted and stick in the summer but not in the winter? That's the moisture content of the wood changing, which causes swelling and shrinkage.

If a finish has zero protection after three coats adding more won't make much of a difference. As it said - the second coat doubles the amount of finish. The third only adds 1/3rd, the fourth 1/4 and so on.

And remember - Springfield only put one coat on Garand stocks before they left the factory.

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Old January 29th, 2017, 03:20 PM   #17
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Originally Posted by JayKosta View Post
Anyone try RAW linseed oil - I recalling 'something' about it drying better and being less tacky than BLO.

Never used it myself.

I did polyur my stock, and that seems to have made it MORE sensitive to humidity changes regarding tightness of trigger guard locking!

Jay Kosta
Endwell NY USA
Every woodworking article I've ever seen (and I have the DVD with all of the Fine Woodworking issues) that calls for linseed oil says to use BLO. Some anal retentive Garand types insist we use RLO because that's what was used in the war, or that it will supposedly age to a color more like wartime pieces. My rifles aren't museum pieces, so I don't care.

Polyurethane coatings build up on the surface. Maybe you inadvertently made the stock too tight?

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