How to Use a RUPES LHR15 Mark V for a Scratch-Free Finish

By Chemical Guys | Car Detailing Supplies, Car Wax and Cleaning Kits | Published: 2026-10-30

Category: How-to Guides

Learn how to use the RUPES LHR15 Mark V orbital polisher to achieve a scratch-free car finish. Step-by-step guide with pro tips for paint correction.

Quick Answer

To get a scratch-free finish with the RUPES LHR15 Mark V, use a light touch, the right pad and compound, and work in overlapping passes at speed 4-5 without excessive pressure.

Why the RUPES LHR15 Mark V is Ideal for Scratch-Free Polishing

The RUPES LHR15 Mark V features a 15 mm orbit and advanced POLYSYNTHEC™ composite gears that reduce vibration and noise, allowing smoother, more controlled passes. This design minimizes the risk of burning paint or leaving holograms, making it easier for beginners and pros alike to achieve a defect-free finish.

Common Mistakes That Cause Scratches

Pressing too hard on the polisher can overload the pad and create micro-marring. Skipping the cleaning step between passes allows spent compound to dry and scratch the surface. Using a pad that's too aggressive for your paint's condition can also leave swirls.

Step-by-Step: Scratch-Free Polishing with the RUPES LHR15 Mark V

1. Prepare the Paint Surface: Wash and dry the car thoroughly. Clay the paint if there is embedded contamination. Tape off trim, edges, and emblems to prevent pad contact. Skipping clay can drag contaminants across the paint, causing new scratches.
2. Choose the Right Pad and Compound: Select a medium-foam polishing pad and a fine-cut compound for light to moderate defects. For heavy correction, use a cutting pad and compound, but test on a small area first. Using a pad that's too aggressive can create haze; always start with the least aggressive combination.
3. Prime the Pad: Apply 3-4 pea-sized drops of compound to the pad. Spread it over a 2x2 foot section at low speed (1-2) before increasing speed. Priming prevents dry buffing, which can cause friction and burn the paint.
4. Set the Speed and Technique: Set the polisher to speed 4-5. Hold the tool flat, apply light pressure (just enough to keep the pad spinning), and work in overlapping crosshatch passes. Move at about 1 inch per second. Too much pressure can stall the pad and create buffer trails; let the tool do the work.
5. Wipe Off Residue and Inspect: After each section, wipe off the compound residue with a clean microfiber towel. Inspect under good lighting. Repeat with a finer polish if needed. Leaving residue on the paint can dry and become abrasive, causing swirls.
6. Finish with a Final Polish: For a true scratch-free finish, follow up with a finishing polish and a soft foam pad at speed 3-4. This step removes any light haze and enhances gloss. Skipping the final polish may leave minor haze from the cutting stage.

Product Facts

RUPES LHR15 Mark V Single Tool: The RUPES LHR15 Mark V uses POLYSYNTHEC™ composite gears to reduce noise and vibration while delivering smooth, consistent performance with less wear and energy loss. Less vibration means better control and reduced fatigue, helping you maintain a steady hand for a scratch-free finish.
RUPES LHR15 Mark V Single Tool