The video “You’d Better Check Your Polyurethane and Tung Oil” is by Stumpy Nubs (James Hamilton). In this video, Stumpy delves into the world of wood finishes, specifically focusing on the realities behind popular products like tung oil and polyurethane. He aims to cut through the marketing hype and help woodworkers make informed decisions without breaking the bank.
Stumpy starts by showcasing a small bottle of what he claims is one of the most expensive wood finishes in his shop. Originally priced at $5.99, this bottle now costs a staggering $150 for just 8 ounces. He explains that the product is no longer manufactured, and the remaining stock is being sold at inflated prices. Stumpy expresses concern over whether people are actually paying such high prices, urging viewers to reconsider their options.
He then reveals a shocking truth: many natural oil finishes that woodworkers favor are not as special as they seem. They often consist of ordinary ingredients cleverly marketed to appear extraordinary. Stumpy’s goal is to expose what he calls the “oily underbelly” of the wood finishing world, providing essential knowledge to choose the right oil finish without succumbing to high prices driven by marketing strategies.
Stumpy presents four examples of natural oil finishes commonly used by woodworkers. He argues that the labels on these products can be misleading, making consumers believe they are purchasing more than what is actually in the can. He emphasizes that while the companies may not be outright lying, the language used on the labels can obscure the truth.
First up is the classic Formby’s finish, which many woodworkers swear by. Stumpy recounts how his grandfather and others dismissed polyurethane in favor of tung oil. However, he points out that what they are actually using might not be pure tung oil. He highlights the difference in viscosity—true tung oil is thick like syrup, while Formby’s is thin like water, suggesting it has been diluted with solvents like mineral spirits. While this dilution may help with application, it results in money evaporating into the air.
Stumpy then brings attention to the fine print on the Formby’s can, which describes it as a “high-quality varnish made from a blend of tung oil and other penetrating oils.” He questions why only tung oil is named, speculating that the rest is likely boiled linseed oil, which doesn’t have the same appeal. He cheekily compares this to how people often overlook the presence of polyurethane in these products, despite it being a common ingredient.
Moving on, Stumpy discusses Danish oil and teak oil, pointing out that pure Danish oil doesn’t exist. He explains that “Danish oil finish” is merely a marketing term. In reality, these products often contain polyurethane, a bit of natural oil, and a lot of cheap solvent. He encourages viewers to read labels carefully, noting that if “finish” is part of the name, it usually indicates a blend of lesser ingredients.
Stumpy continues to dissect more products, including another that prominently features “tongue oil” on the label. He warns that such products are often just diluted versions of pure tongue oil, and they may contain as little as 10% actual tongue oil. The rest is typically inexpensive solvents.
He then compares the costs of wipe-on poly versus regular polyurethane. Stumpy demonstrates that a quart of wipe-on poly costs $20 and covers 75 square feet, while regular polyurethane costs $17 and covers 150 square feet. He argues that the wipe-on version is likely just half the regular poly mixed with more solvent, which is a more economical option if you mix it yourself.
To save money, Stumpy suggests buying regular polyurethane, pouring half into another container, and then adding an equal amount of solvent. This method significantly reduces costs while still providing the desired finish. He also advises viewers on how to create their own versions of Danish oil finishes or tongue oil blends by mixing pure oil, polyurethane, and solvents in various proportions.
Stumpy emphasizes that woodworkers do not need to rely on expensive brands to achieve quality finishes. Instead, they can mix their own products tailored to their specific needs. He encourages experimentation with mixtures to achieve the perfect finish, whether that be more protection or easier application.
In closing, Stumpy reminds viewers that they don’t have to pay a premium for convenience. He acknowledges that while some may prefer the ease of purchasing ready-made finishes, there’s a sense of satisfaction and cost-saving in creating custom mixtures at home.