Birchwood Casey Perma Blue is a popular choice for cold bluing firearms and tools, offering a relatively simple and effective way to restore or enhance a metallic finish. However, achieving professional-looking results requires careful attention to detail and following the instructions precisely. This guide provides a comprehensive walkthrough of the Birchwood Casey Perma Blue application process, addressing common questions and potential pitfalls.
Understanding Perma Blue: What it is and What it Does
Perma Blue is a chemical bluing solution, meaning it doesn't require heat. This cold bluing process reacts with the iron in the steel to create a dark blue-black finish. It's ideal for touch-ups, small parts, or complete projects where heating the metal isn't feasible or desirable. It's important to understand that this isn't a plating; it's a chemical reaction altering the surface of the metal itself.
Preparation: The Key to a Successful Finish
The success of your Perma Blue project hinges heavily on proper preparation. Rushing this stage will almost certainly result in an uneven or unsatisfactory finish.
1. Cleaning the Metal Surface:
- Thorough Cleaning: Use a suitable degreaser (Birchwood Casey makes one specifically designed for this purpose) to remove all oils, grease, dirt, and contaminants. Acetone or mineral spirits can also work, but ensure complete drying afterward. Scrubbing with a stiff brush may be necessary for heavily soiled surfaces.
- Removing Rust and Oxidation: Any existing rust or oxidation must be removed before applying Perma Blue. Use a wire brush, steel wool, or sandpaper to achieve a clean, bare metal surface. For stubborn rust, consider a chemical rust remover, but ensure you neutralize it completely and thoroughly clean the area afterward.
- Important Note: Avoid using abrasive cleaners or scouring pads that could scratch the metal. Fine steel wool or polishing compounds are acceptable for smoothing minor imperfections but use cautiously.
2. Preparing the Application Area:
- Masking: If you're only bluing specific areas, use painter's tape or similar masking materials to protect the surrounding surfaces. Ensure the tape adheres tightly to prevent the solution from seeping underneath.
- Ventilation: Work in a well-ventilated area. Perma Blue emits fumes, and it's essential to avoid inhaling them. Wear appropriate respiratory protection if necessary.
Applying Perma Blue: A Step-by-Step Guide
Now that the surface is prepared, it's time for the application process.
1. Applying the Solution:
- Using a Cotton Swab or Applicator: Apply a thin, even coat of Perma Blue using a cotton swab, cloth, or other suitable applicator. Avoid pooling or heavy applications.
- Working in Small Sections: For larger projects, work in small sections to ensure even coverage and prevent the solution from drying prematurely.
- Even Coats are Crucial: Multiple thin coats are always better than one thick coat.
2. Allowing the Solution to React:
- Waiting Time: The manufacturer's instructions should be followed precisely regarding wait times between coats. Generally, you'll need to let the solution sit for a few minutes before wiping off the excess.
- Checking the Finish: After the appropriate waiting time, wipe away the excess Perma Blue with a clean cotton cloth. Examine the surface for uniformity; if needed, apply additional thin coats following the manufacturer's directions. The color will darken as more coats are applied.
3. Neutralization and Final Cleaning (optional):
- Neutralizing Solution: Some users prefer to use a neutralizing solution after the final coat to ensure a uniform finish and prevent any further chemical reaction. Birchwood Casey offers a suitable product for this purpose.
- Finishing Touches: After the final coat has dried, use a fine steel wool to remove any minor imperfections or blemishes. A light coat of oil will protect the finish and enhance its luster.
Troubleshooting Common Problems
- Uneven Finish: This is usually due to improper cleaning or uneven application. Re-clean the surface and apply additional thin coats in the affected areas.
- Light Color: This may be because the metal wasn't properly cleaned, the solution was applied too thinly, or there wasn't enough time allowed for the reaction.
- Streaks or Blotches: These can be caused by uneven application, too much solution in one area, or contamination.
Safety Precautions
Always follow the safety precautions outlined on the Perma Blue packaging. This includes wearing gloves, eye protection, and working in a well-ventilated area.
This comprehensive guide aims to provide detailed instructions for using Birchwood Casey Perma Blue. However, always refer to the manufacturer's instructions included with your specific product for the most accurate and up-to-date information. Remember, patience and attention to detail are crucial for achieving a professional-looking finish.
