How to Polish Your Pinewood Derby Car’s Axles and Wheels (2024)

The quality of your Pinewood Derby car’s axles and wheels may be the most important factor in building a fast car. Here’s how to choose and polish your car’s axles and wheels.

Polishing Pinewood Derby Axles

1. Start with a set of raw axles.

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2. Can you tell the difference between the axles in the top row and the ones on the bottom? The ones on the bottom aren’t straight and will slow your car.

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3. To tell which are straight and which aren’t, mark each axle with a marker about 1/2 inch from the pointed end.

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4. Have an adult clamp a power drill into a vise, a device that will hold it perfectly still.

5. Have an adult help you insert each axle into the drill at the location you marked in Step 3. Have the adult turn on the drill.

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6. Bent axles will wobble as they turn in the drill. Straight axles will hardly wobble at all. Pick the ones that wobble least.

7. Once you’ve selected the four straightest axles, use a file or fine-grit sandpaper to remove small burrs and mold marks that can cause friction and slow a car. These imperfections should be removed from both the axles and the wheels. Watch this video to learn one way to do this.

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8. Use polishing compound from the auto supply store to polish the wheels and axles. One easy way to do this is to clamp the axles back in the drill and let the drill spin the axle while you polish it.

9. When you install the axles and wheels, make sure they are aligned perfectly straight. You can test the alignment of your axles by pushing your car across a smooth floor or table. It should roll in a straight line.

10. Don’t forget to add graphite or another dry lubricant to your wheels and axles.

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How to Polish Your Pinewood Derby Car’s Axles and Wheels (2024)

FAQs

How to Polish Your Pinewood Derby Car’s Axles and Wheels? ›

Use polishing compound from the auto supply store to polish the wheels and axles. One easy way to do this is to clamp the axles back in the drill and let the drill spin the axle while you polish it. 9. When you install the axles and wheels, make sure they are aligned perfectly straight.

How do I make my Pinewood Derby car shiny? ›

Use a final gloss clear paint coat to give your car an extra shine. Some people use car wax but clear paint gives better results. You will get better results if you give your car several light coats of paint rather than one or two thick coats. Sand your car lightly after the first coat of paint dries.

What grit sandpaper for Pinewood Derby axles? ›

Use the small file to bring these edges down, and then finish with 400 and 800-grit sandpaper. The axle prep kit contains a special tool to insert the axle into a drill. Otherwise, you'll need to complete this step by hand.

What do you use to polish Pinewood Derby axles? ›

Use polishing compound from the auto supply store to polish the wheels and axles. One easy way to do this is to clamp the axles back in the drill and let the drill spin the axle while you polish it.

Can you use wd40 on a Pinewood Derby car? ›

No wet lubricant is allowed. (Ex: NyOil, NyOil II, WD-40) Only one lubrication is allowed before the beginning of the first race, and then once again before the beginning of the first race of the semi-finals and finals.

Should you sand your Pinewood Derby wheels? ›

The wheels may be slightly sanded to remove any mold marks but may not be modified in any other way. Only the Official Scout Grand Prix wheels may be used. Wheels may be sanded (smoothed to remove knit/mold lines) but the wheel's profile may not be altered.

How to improve Pinewood Derby wheels? ›

Lubricate the Wheels with Graphite

Too much friction slows the car as gravity helps it race down the track. To reduce friction and ensure an ultra-fast car, lubricate the metal axles. However, ensure you follow the rules so your Scout isn't disqualified!

Should I glue pinewood derby axles? ›

Slide the axles and wheels onto the car and glue into place. Use an epoxy or nonresin glue, and make sure you don't get any on the surface of the axle where the wheel rides.

What do you seal a Pinewood Derby car with? ›

Seal and protect it by spraying the entire car with clear gloss paint. Some clear paints might make the numbers curl. To make sure yours works, test it on a decal or number stuck to scrap plastic before spraying your car.

How far to push in Pinewood Derby axles? ›

Push until the wheel touches the car body. The base is designed to leave the proper gap between the wheel and body. 5. The axle will need to be glued if it slips easily into the car body.

How to paint Pinewood Derby wheels? ›

Pinewood Derby Car Chrome Wheel Spokes
  1. Clean the wheel with a soft rag.
  2. Remove any excess paint from the tip of the marker by wiping it on a piece of paper.
  3. Paint the spokes by rotating the wheel under the marker. Keep the marker at the same angle. ...
  4. Let the paint dry for two hours before mounting the wheels on your car.

Does baking a Pinewood Derby car help? ›

Baking your Pinewood Derby wooden block helps to remove the moisture so that you have more wiggle room to add extra weight at the end. Remember, every little bit of weight in the right place makes a difference! Bake it in the oven at 250° for about 2 hours.

What is the best wax for Pinewood Derby cars? ›

Pro Bore Wax

It leaves a very slick final finish that reduces friction for smooth, quick starts and faster overall runs.

Can you use spray paint on a Pinewood Derby car? ›

Step 3: Choose a color for your Pinewood Derby car. Then apply two to three coats of enamel paint to the car's body. Spraying the model with paint from an aerosol can is easier than using a brush. If you use a brush, dip only the lower third of the brush into the paint.

Should I sand the wheels on a Pinewood Derby car? ›

Don't forget your safety goggles! Starting with about 300 grit sandpaper sand the wheels. Work up to as fine of grit as you can find. Only sand enough to remove imperfections and make the wheel round as possible.

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