Wood Finish Comparison Tool

“Polyurethane or hardwax oil for my table?” “Danish oil or tung oil for a bowl?” Most comparison articles answer one pairing at a time and bury the trade-off. This tool puts any two finishes side by side on the seven properties that actually decide a project, and explains the mechanism behind each difference — so the comparison holds up when your project does not match the example.

Part of the wood finishing guide. If you have not narrowed it to two candidates yet, start with the finish selector — it recommends one for your species and use.

Why “More Durable” Is the Wrong Question

The finish that scores highest on durability is almost never the right answer on its own, because durability trades directly against repairability. The same cross-linked film that makes oil-based polyurethane resist abrasion and heat is what makes it impossible to spot-repair — a scratch means sanding back and recoating a whole panel. A shellac or oil finish is far softer, but a scratch wipes out with a fresh application in minutes because the finish re-dissolves into itself.

Neither is “better”; they solve different problems. This is why the tool shows all seven axes rather than a single winner: the score that matters is the one on the property your project actually depends on.

Film Finishes vs Penetrating Oils: The Divide Behind Most Rows

Most of the differences the tool shows trace back to one distinction: whether the finish forms a film on top of the wood or penetrates into it. Film finishes — polyurethane, varnish, lacquer, shellac — sit on the surface as a continuous layer, which is what gives them water and heat resistance a penetrating oil cannot match.

Penetrating oils — tung, linseed, danish — soak into the wood fibres and harden there, leaving the surface feeling like wood rather than plastic, at the cost of that protective film. Hardwax oil is the interesting hybrid: it penetrates like an oil but leaves a thin wax-and-oil film that closes the surface, which is why it scores higher on water resistance than a pure oil. The full mechanism is in film-forming vs penetrating finishes.

Thermoplastic vs Thermoset: Why Repairability Splits So Sharply

The repairability column splits sharply — oils and thermoplastic finishes score 5, polyurethane scores 2 — and that is not an accident. Thermoplastic finishes (lacquer, shellac) and oils never chemically “set” into an irreversible network: fresh solvent re-softens them, so a new coat melts into the old one for an invisible repair. Polyurethane and catalyzed finishes cross-link into a permanent network that no solvent can re-dissolve, so a repair can only sit on top mechanically, never blend in.

Alkyd varnish sits in between: it is also irreversible, but its lower cross-link density means a scratch can be sanded locally and re-varnished with reasonable blending — something a dense polyurethane film resists. If you expect a piece to get knocked about and want to fix it yourself, this distinction matters more than the durability score. It is explained in full in thermoplastic vs thermoset finishes.

Frequently Asked Questions

Which finish is the most durable overall?

Oil-based polyurethane tops the durability and water-resistance axes — its urethane cross-link density produces a film roughly twice as hard as alkyd varnish or hardwax oil (König pendulum 120–160s vs 60–100s). But durability alone rarely decides a project: polyurethane scores lowest on repairability, so a scratched surface means sanding and recoating rather than a quick touch-up.

What is the best finish for a kitchen table?

A kitchen table needs high water and heat resistance, which points to oil-based polyurethane or hardwax oil. Hardwax oil trades a little hardness for far easier repair and a more natural feel; polyurethane is tougher but harder to fix. Compare the two directly in the tool above to see the trade-off on every axis.

Are the ratings brand-specific?

No. The scores reflect the chemistry of the finish category, not any single product. A premium and a budget polyurethane differ, but both behave like polyurethane relative to, say, shellac. Always check the specific product’s technical data sheet for exact figures.

This tool compares two finishes — how do I just pick one?

Use the finish selector instead. It asks about your species, use case, and priorities and recommends a single finish. This comparison tool is for when you have already narrowed it to two candidates and want to understand the difference between them.