PolarShine 35 is a coarse polishing compound developed for demanding industrial and marine applications. It is formulated to work on gel coat, high-gloss lacquers and composites, removing scratches and sanding marks in fewer passes than other conventional compounds. Its special emulsifying properties protect the surface from drying out and overheating during the polishing process.
Technical specifications
| Feature | Detail |
|---|
| Type | Coarse polishing compound |
| Application | Industrial and marine |
| Compatible materials | Gel coat, high-gloss lacquers, composites |
| Special properties | Emulsifying, anti-drying, anti-overheating |
| Viscosity | High (reduces splatter) |
| Presentation | 250 ml |
What it is used for
PolarShine 35 is designed for the cutting phase in polishing processes on composite or lacquered surfaces. It removes deep sanding marks, surface oxidation and scratches before moving on to a fine finishing compound such as PolarShine 10. Especially useful in composite workshops, boatyards and marine bodywork.
- Removal of sanding marks (P1000–P1500 grit) on gel coat
- Polishing of lacquered or epoxy-coated carbon fibre parts
- Restoring gloss on boat hulls and marine decks
- Polishing epoxy resin laminates with a high-gloss finish
- Correcting surface defects in industrial lacquers
- Surface preparation before fine polishing or application of protective wax
How to use it
- Make sure the surface is clean, dry and free of dust or contaminants. If the part has release agent residue, remove it with a suitable degreaser before polishing.
- Shake the container well before use to homogenise the compound.
- Apply a small amount of PolarShine 35 directly onto the polishing pad or onto the surface to be worked.
- Work with an orbital or rotary polisher at medium speed (1200–1800 rpm depending on the machine). Keep the pad in constant motion to avoid burn marks.
- Work in sections of approximately 40×40 cm, using cross passes, until the compound becomes almost transparent.
- Remove residue with a clean microfibre cloth.
- Evaluate the result. If scratches remain, repeat the step with PolarShine 35. Once satisfied with the cutting stage, continue the process with PolarShine 10 for the fine finish.
- Finally, protect the surface with a paste wax to extend the gloss.
Usage tips
Temperature and speed control
One of the advantages of PolarShine 35 over other cutting compounds is its ability to reduce overheating. Even so, avoid working with heavily worn pads or at excessive speeds on thin gel coat surfaces: accumulated heat can mark or deform the part. If you notice the compound drying out too quickly, add a few drops of water to the working area to extend the working window.
Choosing the pad and machine
For aggressive cutting on composites or oxidised gel coat, use a medium-fine cut foam pad (orange or yellow, depending on the manufacturer). On more delicate surfaces or soft lacquers, opt for a fine cut pad to better control the abrasion. The high viscosity of PolarShine 35 reduces splatter even at medium-high speeds, making it easier to work in vertical positions such as on boat hulls.
Integration into the full finishing process
PolarShine 35 is the first stage of a two-step process. After cutting, finishing with PolarShine 10 removes residual micro-scratches and maximises gloss. If the part has deeper imperfections (pores, bubbles, dull patches), consider filling them beforehand with epoxy filler before starting the polishing process.
Frequently asked questions
What type of machine is used with this polishing compound?
PolarShine 35 is compatible with dual-action orbital polishers and rotary polishers. For gel coat or composite surfaces, the dual-action orbital offers greater safety and lower risk of marking. The rotary allows more aggressiveness in areas with deep oxidation. Always check the recommendations of your machine's manufacturer to adjust speed and pad type.
Can it be applied by hand without a machine?
Technically yes, but the results will be very limited. PolarShine 35 is a coarse compound designed to work with the friction and controlled heat generated by a polisher. By hand, the abrasion will not be uniform and the process will be exhausting on large surfaces. For very small touch-ups or hard-to-reach areas, it can be used with a manual applicator, but for professional results a machine is always recommended.
Is it necessary to use a fine finishing compound afterwards?
Yes. PolarShine 35 is a coarse cutting compound that removes scratches and marks, but leaves micro-scratches from its own abrasive grit. To achieve a high-gloss, deep finish, it is essential to follow up with a fine compound such as PolarShine 10. Skipping this step will leave the surface with a dull or hazy finish.
What prior sanding does the surface need before polishing?
PolarShine 35 is capable of removing sanding marks from P1000 grit upwards. If the surface has coarser marks (P400–P800), it is advisable to sand with P1000–P1200 before starting with this compound. Trying to skip sanding steps with the polishing compound only prolongs the process and wears the pad out sooner.
Can it be used on epoxy resin without gel coat?
Yes, provided the epoxy resin has fully cured and has a smooth finish. It is common to polish epoxy laminate parts or epoxy coatings with PolarShine 35 to remove manufacturing process marks before applying a high-gloss finish. Make sure there are no release agent residues on the surface before polishing.
How much product is needed per square metre?
Consumption varies depending on the condition of the surface and the technique used, but as a general reference, a 250 ml container covers between 4 and 8 m² under normal working conditions with a polisher. On heavily oxidised surfaces or those with many imperfections, consumption may be higher.
Is it compatible with all lacquers and paints?
PolarShine 35 is specially formulated for gel coat, high-gloss lacquers and composites. On soft lacquers or delicate finish paints, it is recommended to test on an inconspicuous area before working the entire surface, using the least aggressive pad possible and a low speed, to avoid damaging the finish.
How should the product be stored once opened?
Close the container tightly after each use and store it in a cool, dry place away from direct heat. Avoid contaminating the product with water or pad residue. Under suitable conditions, the compound retains its properties for a long period. If you notice phase separation, shake well before use.
