Mirka OSP 2.75" x 33.5' Perf-Roll, model OS-570-001, is a perforated sanding roll built for surface preparation and refinishing work. This is a perforated sanding roll designed for sanding and optimized surface preparation. It is aimed squarely at auto body technicians, paint and prep workers, and anyone doing repeatable sanding steps where uniform strip size and quick tear-off matter.

This roll is part of Mirka's OSP, or Optimized Surface Preparation, system and is identified for steps 1 through 3 of that process. In practical terms, that means it is meant to support multiple stages of repair and prep instead of being a one-task abrasive. Source data lists it for sanding tasks involving steel, aluminum, plastics, plaster and filler, body filler, primer, UV primer, clear coat, top coat, lacquer, and paint sanding or paint removal. That broad material range matters in collision repair and refinishing because the same job often moves from bare metal to filler to primer in one workflow.

The 2.75-inch width is a useful format for hand sanding blocks and narrow prep areas, and the 33.5-foot roll length gives you enough material for repeated use without constantly opening new packs. Mirka also notes that the roll is perforated, and Amazon's product data adds that the perforations are every 2-3/4 inches. That makes it easier to tear off consistent sections, which helps standardize the process across different operators and reduces the guesswork that leads to wasted abrasive.

Mirka positions this product as part of a complete system for auto body repair applications, with a focus on improved consistency and less re-work. That is the real value here. When abrasive steps are clearly defined and sized consistently, it is easier to maintain a predictable scratch pattern and move to the next stage without doing extra cleanup work. For a body shop, that can mean better panel prep and fewer surprises before primer or paint.

This is still a straightforward consumable, so the buying decision comes down to workflow. If you want a perforated sanding roll that fits into a structured surface prep process, covers common refinishing materials, and gives you a high piece count per roll, this Mirka option makes sense. It is especially well suited to auto body repair, paint removal, feather edging, body filler shaping, and primer preparation where repeatability matters more than gimmicks.

Simple Product, Smart Workflow Upgrade

The Mirka OSP 2.75" x 33.5' Perf-Roll is a smart buy for shops that care more about process control and consistent prep than flashy packaging.

• Who it's for: Auto body techs, refinishers, and prep workers handling paint removal, filler work, feather edging, and primer prep.
• Why it stands out: The perforated roll format and OSP system approach make it easier to keep abrasive lengths consistent and reduce re-work across repeat jobs.
• Worth knowing: This is a consumable roll, not a kit with extra accessories, and the available source data does not specify a conventional grit number.

• What kind of product is this? This is a perforated sanding roll for sanding and surface preparation work.
• What materials can it be used on? Source data lists steel, aluminum, plastics, plaster and filler, body filler, primer, UV primer, clear coat, top coat, lacquer, and paint-related sanding or removal applications.
• Is this part of a larger Mirka process? Yes. It is identified as part of Mirka's Optimized Surface Preparation system for steps 1 through 3.
• How many pieces does one roll provide? One roll provides 146 perforated pieces according to the source data.