Quick answer: Clean a loaded buffing wheel with a buffing rake. With the wheel spinning, hold the rake lightly against the face so its teeth pull out the caked compound and metal fines and open up fresh cloth. Twenty seconds usually does it. Never wash an airway buffing wheel in water – it ruins the treatment. Rake it, keep one wheel per compound, and replace it when the cloth is frayed or worn down to the center.
Why buffing wheels load up
Every pass on a buffing wheel leaves compound, metal fines and burned binder packed into the face of the cloth. As that builds up the wheel stops cutting, starts smearing, and leaves streaks or a hazy finish instead of a shine. A loaded wheel also runs hotter, needs more pressure, and wears out faster – so cleaning is what keeps your finish consistent and your wheels lasting.
How to clean a buffing wheel with a rake
- Put on safety glasses and a dust mask; raked compound comes off as fine dust.
- Run the buffer at its normal speed.
- Hold a buffing rake firmly with both hands and press its teeth lightly into the face of the spinning wheel, working across the full width.
- Keep going until the caked compound is gone and the cloth looks fluffy and open again – usually 15–30 seconds.
- If the wheel has gone glazed and hard, rake a little more aggressively to break the glaze and expose fresh cloth.
That's the whole job. Raking is also how you "dress" a new wheel to fluff it before first use, and how you refresh a wheel that has taken a set from sitting.
What not to do
- Don't soak or wash treated wheels. Airway buffing wheels get their stiffness from a mill treatment; water washes it out and leaves you with a limp wheel that won't cut. Washing is only for untreated cotton wheels that are heavily contaminated, and even then they need to dry completely before use.
- Don't mix compounds on one wheel. Cutting compound left in a wheel will scratch a piece you're trying to color. Keep one wheel per bar and mark them.
- Don't over-load compound. Touch the bar to the wheel for a second or two; if you can see compound flying off, that's excess that will end up on the part and in the wheel.
When to replace instead of clean
Rake first. Replace the wheel when the cloth is frayed or shedding, when it's worn down close to the center plate, when it won't come back to a clean cut after raking, or when it has wobbled out of balance and vibrates. A wheel that's been used with the wrong compound for its treatment is usually salvageable with a thorough raking.
Keeping wheels in good shape
- Rake at the start of each session and whenever the finish starts to streak.
- Use the right treatment for the compound – see the buffing wheel and compound chart.
- Run below the wheel's rated RPM and always with the correct safety flanges.
- Store wheels dry and covered so they don't pick up grit that ends up in your finish.
Shop airway buffing wheels from 6" to 20", and the buffing rake that keeps them working.
