The Power TEC 91448 Abrasive Pen is a retractable glass fibre scratch brush designed for precise surface preparation during automotive bodywork repairs.

Rather than sanding a much larger area than necessary, the pen allows the technician to concentrate abrasive action directly on the damaged or corroded spot.

It is particularly useful for preparing:

• Stone chips

• Small rust spots

• Paint defects

• Tight corners

• Panel edges

• Small recesses

• Difficult to reach areas

The abrasive element consists of glass fibre bristles contained within the pen body.

Turning the cap changes how far the fibres project from the end of the tool.

This does more than simply alter their length.

With only a short section exposed, the fibres are supported by the body and therefore feel firmer for more concentrated abrasion.

Extend more of the fibres and they become increasingly flexible, allowing the operator to adapt the brush to the surface being treated.

Maximum adjustable brush projection is approximately 25mm.

Features & Benefits

• Pen style precision abrasive tool.

• Glass fibre abrasive bristles.

• Retractable scratch brush design.

• Ideal for automotive spot rust removal.

• Excellent for preparing stone chips before touch up.

• Reaches small and confined areas.

• Allows very localised surface preparation.

• Helps avoid unnecessarily sanding surrounding paintwork.

• Adjustable bristle projection.

• Twist adjustment changes bristle length and firmness.

• Maximum brush projection approximately 25mm.

• Compact 120mm overall length.

• No electricity or compressed air required.

• Useful addition to bodyshop and restoration toolkits.

Why Use an Abrasive Pen?

Imagine a stone chip only a few millimetres across beginning to show corrosion.

The surrounding paint may still be perfectly sound.

Using a conventional sanding block means working over a much larger area than the actual defect.

A rotary abrasive tool can be unnecessarily aggressive and requires considerably greater control.

The abrasive pen approaches the repair differently.

The technician can work directly inside the damaged area, removing corrosion and preparing the surface while keeping disturbance of the surrounding finish to a minimum.

That makes it particularly useful before small touch up repairs.

Workshop Notes

Start with only a short length of glass fibre exposed.

This provides greater support to the bristles and therefore a firmer, more controlled abrasive action.

Extend the fibres progressively if a softer or more flexible brushing action is required.

Use light, controlled strokes rather than excessive pressure.

The objective is to remove contamination, loose corrosion and unsuitable material from the repair area, not unnecessarily enlarge the damaged section.

Frequently inspect progress.

Once clean metal has been reached, stop.

The repaired area should then be cleaned and prepared in accordance with the requirements of the primer, paint or corrosion protection system being used.

💡 Tool Academy Special

One Sentence Springs to Mind...

"When the rust spot is tiny, the tool tackling it should be too."

Stone Chip Preparation

Stone chips are one of the applications where the 91448 really makes sense.

A chip can penetrate the protective paint layers and expose the metal underneath.

If corrosion begins inside that tiny damaged area, simply applying touch up paint over the top may hide rather than properly prepare the problem.

The abrasive pen gives the user a means of carefully cleaning inside the chip before refinishing.

Because the working area is so small, control is far more important than speed.

This is where a hand operated precision tool has a considerable advantage.

Adjustable Bristles Explained

The twist adjustment isn't simply a convenient way of storing the fibres inside the pen.

It changes the way the tool behaves.

Shorter Bristle Projection

Keeping the glass fibres relatively short provides:

• Greater firmness.

• More concentrated abrasive action.

• Improved control.

• Better precision on very small areas.

Longer Bristle Projection

Extending the fibres further provides:

• Greater flexibility.

• Softer brushing action.

• Improved ability to follow small contours.

• Better access into certain recesses.

Maximum adjustable brush length is approximately 25mm.

That means one very simple adjustment changes the character of the tool considerably.

Ideal for Hard to Reach Areas

Not every corrosion spot is conveniently positioned in the middle of a flat panel.

Rust and paint damage frequently occur around:

• Panel edges

• Seams

• Small recesses

• Apertures

• Mounting areas

• Corners

• Detailed bodywork features

The narrow pen design allows abrasive preparation in locations that can be awkward to approach with conventional sanding equipment.

At 120mm overall length, it handles much like a marker or conventional pen, giving the operator close control over the working tip.

A Precision Tool, Not a Rust Removal Machine

The 91448 is intended for small scale preparation work.

It isn't designed to replace a wire wheel, sanding disc or powered surface preparation tool when removing heavy corrosion from a large area.

If an entire panel or substantial component is heavily rusted, another method will be considerably faster.

Where this tool earns its place is at the opposite end of the scale.

One stone chip.

One tiny rust spot.

One awkward corner.

One area where removing an extra 20mm of perfectly good paint would create more work than necessary.

That's what the abrasive pen is for.

Glass Fibre Bristle Safety

The abrasive tip consists of fine glass fibres.

These should be treated differently from ordinary plastic brush bristles.

Wear suitable gloves when using the tool and avoid direct contact with loose or broken fibres.

Suitable eye protection should also be worn during abrasive preparation.

Do not brush loose fibres away with bare hands.

Clean the working area carefully after use and dispose of abrasive debris appropriately.

Retract the fibres into the body when the tool is not being used.

Keep away from children.

Typical Applications

Ideal for:

• Automotive stone chip preparation.

• Spot rust removal.

• Localised corrosion cleaning.

• Preparation before paint touch up.

• Small bodywork repairs.

• Restoration work.

• Cleaning tight recesses.

• Preparing awkward panel edges.

• Removing contamination from small metal areas.

Important Usage Information

Use only the amount of exposed fibre necessary for the task.

Begin with light pressure.

Frequently inspect the surface during preparation.

Avoid unnecessary abrasion of surrounding sound paint.

Do not use on surfaces where abrasive scratching would cause unacceptable damage.

Wear suitable eye protection and gloves.

Avoid skin contact with broken glass fibres.

Clean the repair area thoroughly before applying subsequent coatings.

Retract the abrasive fibres after use.

Specification

Manufacturer: Power TEC

Part Number: 91448

Product Type: Abrasive Pen

Abrasive Material:

• Glass Fibre

Design:

• Retractable Abrasive Fibre Scratch Brush

Primary Application:

• Automotive Spot Rust and Paint Preparation

Suitable for Stone Chip Preparation:

• Yes

Bristle Adjustment:

• Twist Cap

Maximum Adjustable Brush Length:

• Up to 25mm

Overall Tool Length:

• 120mm

Power Required:

• None

Why Choose Power TEC?

Power TEC specialises in tools and equipment for automotive body repair, panel preparation and refinishing.

The 91448 follows that philosophy perfectly.

There are faster ways of removing rust.

There are larger ways of removing rust.

But bodywork isn't always about removing material as quickly as possible.

Sometimes the skill lies in disturbing only what actually needs repairing.

For small chips and localised corrosion, that degree of control can save considerable additional preparation afterwards.

Chief Editor's Observation

This is one of those tools that doesn't look particularly exciting until the day you actually need one.

You've got a tiny stone chip with the beginnings of rust inside it. The surrounding paint is perfectly good, and every conventional abrasive tool on the bench seems capable of turning a five millimetre repair into a fifty millimetre one.

Then somebody hands you what looks like a pen.

A few careful strokes later, the corrosion is cleaned out and you're ready for the next stage.

There's something rather satisfying about that.

Workshops are full of increasingly powerful equipment, but good repairs aren't always about power.

Sometimes they're about knowing exactly when to stop removing material.