Craft · 6 pages · 12 min
Why oil and film finishes fail differently
Oil wears away inside the fibers, while a film finish cracks and peels as a skin.
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From the opening
An oil finish soaks into the wood and hardens inside the fibers, leaving little or no separate skin on top. A film finish, such as varnish, lacquer, or polyurethane, cures as a layer sitting on the surface, and that layer can crack, peel, or wear through as a sheet. The opening covers oil lives in the fibers, film fails as a skin, and water travels under a crack.
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Inside
- Oil lives in the fibers
- Film fails as a skin
- Water travels under a crack
- A worn oil has no edge
- Where the idea stops applying
- A distinction worth keeping
Sources
- Drying-oil finishes in the wood surface
- Cracking and peeling of varnish films