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The short answer: To get a smooth finish with a Wooster Sherlock roller, use the correct nap for your surface, load the roller properly, and use a consistent rolling technique without overworking the paint. The Sherlock’s unique frame and core allow for even paint distribution, but technique matters more than the tool.
The Wooster Sherlock is a favorite among painters for its sturdy construction and smooth rolling action. It features a metal core with a unique bearing system that reduces friction, making it easier to roll paint evenly. The frame is designed to stay straight and stable, which helps prevent skipped areas and uneven coverage.
However, no roller can guarantee a smooth finish on its own. The key is pairing the right nap with your surface and using proper technique. For most interior walls, a 3/8 inch nap works well for smooth or semi-smooth surfaces. For textured walls, you might need a 1/2 inch or 3/4 inch nap. The Sherlock roller cover fits standard frames, so you have plenty of options.
Before you start, ensure the wall is clean, dry, and free of dust. Repair any holes or cracks and sand them smooth. Use a primer if you’re painting over a dark color or new drywall. Stir your paint thoroughly, and if needed, strain it to remove any lumps. For best results, use a paint conditioner like Floetrol to extend open time and improve leveling.
Select a Wooster roller cover with the appropriate nap. For smooth walls, a 3/8 inch nap is ideal. Attach it to the Sherlock frame. To load the roller, dip it fully into the paint tray, then roll it back and forth on the ridged section to evenly distribute the paint. The goal is to get the cover saturated but not dripping. If paint drips, roll it out on the tray a few more times.
Start at a corner and roll in a “W” or “M” pattern to spread the paint, then fill in with parallel strokes. Always roll in one direction, from bottom to top, to avoid lap marks. Keep a wet edge by overlapping each stroke slightly with the previous one. Avoid pressing too hard; let the roller do the work. The Sherlock’s bearing system allows for smooth, light pressure.
One of the biggest mistakes is going over the same area too many times. This can create texture and leave brush marks. Once you’ve spread the paint evenly, stop. If you see a missed spot, wait until the paint is dry to the touch, then lightly re-roll with a barely loaded roller or use a small brush to touch up.
Work in small sections of about 4×4 feet. This ensures you can keep the paint wet and avoid hard edges. Overlap each row by 2 to 3 inches. For ceilings, use an extension pole to reduce fatigue and maintain a steady stroke.
The Sherlock frame is compatible with all standard roller covers, so you can switch naps easily. Its sealed bearing system prevents paint from seeping into the handle, making cleanup easier. To get the smoothest finish, consider using a microfiber roller cover, which is designed to leave a smooth, sprayed-like finish. You can find a range of roller covers and frames in our best paint rollers guide.
Also, remember to use a high-quality paint. Higher VOCs may level better, but low-VOC paints have improved greatly. If you’re using a matte finish, be aware that it’s less forgiving than satin or eggshell. Test on a small area first.
The Sherlock frame is available in several sizes, most commonly 9 inches and 4 inches, and it accepts standard roller covers with a 1.5-inch core. That means you are not locked into Wooster-brand covers. Any cover from a reputable brand will slide on, as long as the core diameter matches. The frame also has a threaded handle that fits standard extension poles, which is useful for ceilings and high walls.
Before buying, check the diameter of your existing roller covers. If they have a 1.5-inch core, they will fit the Sherlock. Covers with a larger core, such as some 2-inch models, will not. Also consider the frame length: a 9-inch frame is the standard for walls, while a 4-inch mini roller is better for trim, doors, and cabinets. The Sherlock’s bearing system is sealed, so it resists paint buildup, but it is not designed to be disassembled for cleaning. If you frequently switch between paint types, having a separate frame for each can save time.
Proper care extends the life of both the frame and the covers. After each use, remove the cover and rinse it thoroughly. For latex paint, warm water and a little dish soap work well. For oil-based paint, you will need mineral spirits or a dedicated brush cleaner. Squeeze the water out gently; do not wring the cover, as this can damage the fibers. Let it air dry standing on end so air circulates through the nap.
The Sherlock frame itself should be wiped down with a damp cloth. Avoid soaking the handle, as water can get inside and cause the bearing to rust over time. If paint dries on the frame, a stiff brush and warm soapy water will remove it. For storage between coats, wrap the cover tightly in plastic wrap or place it in a sealed plastic bag. This keeps it from drying out for up to a day. For longer storage, clean and dry the cover completely before putting it away.
If you notice the roller cover becoming matted or flat, it is time to replace it. A worn cover will not hold paint evenly and can leave streaks. The frame itself should last for many projects if kept clean and dry. Some painters keep a dedicated frame for each type of paint to avoid cross-contamination.
While the Sherlock is a versatile tool, there are situations where a different roller or applicator may serve you better. For very small touch-ups or painting behind radiators, a mini roller or a brush is more practical. For textured surfaces like stucco or rough brick, a thick nap roller on a standard frame may be more appropriate, as the Sherlock’s precision bearing is less critical on such surfaces.
If you are painting with a paint sprayer, the Sherlock is not needed. Similarly, for applying stains or sealers, a specialized applicator may give you more control. The Sherlock excels on smooth to semi-smooth interior walls and ceilings, where its smooth rolling action and even paint distribution make a noticeable difference. For exterior siding, a thicker nap roller on a sturdy frame is often preferred. Knowing when to use the right tool for the job will save you time and frustration.
Yes, the Sherlock works with latex, oil-based, and acrylic paints. Just clean it thoroughly with the appropriate solvent when switching between types.
Remove the roller cover and rinse it with water (for latex) or mineral spirits (for oil-based). Squeeze out excess water and let it air dry. The frame itself can be wiped clean with a damp cloth.
Wrap the roller cover in plastic wrap or place it in a sealed plastic bag to keep it from drying out. It can be stored for up to a day this way.
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