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Home :: Micro-Mesh® NC-78-1 Acrylic Restoral Kit Instructions for Use

Micro-Mesh® NC-78-1 Acrylic Restoral Kit Instructions for Use

Micro-Mesh® NC-78-1 Acrylic Restoral Kit Instructions

This kit contains all grades of Micro-Mesh® to remove light damage and restore optical clarity. Ideal for underwater camera domes.

Will restore up to 30 square feet of plastic. Video link below was done by a customer restoring his underwater camera dome.
Video - Micro-Mesh NC-78-1 Acrylic Restoral Kit

Micro-Mesh® NC-78-1 Kit Components:

  • 1- 3" x 6" Sheet 1500
  • 1500 Grade Micro-Mesh® is equal to P600-800 grit or 30 micron
  • 1- 3" x 6" Sheet 1800
  • 1800 Grade Micro-Mesh® is equal to P1200-1500 grit or 15 micron
  • 1- 3" x 6" Sheet 2400
  • 2400 Grade Micro-Mesh® is equal to P1500-2000 grit or 12 micron
  • 1- 3" x 6" Sheet 3200
  • 3200 Grade Micro-Mesh® is equal to Finer than P2500 grit or 8.5 micron
  • 1- 3" x 6" Sheet 3600
  • 3600 Grade Micro-Mesh® is equal to 8 micron
  • 1- 3" x 6" Sheet 4000
  • 4000 Grade Micro-Mesh® is equal to 5 micron
  • 1- 3" x 6" Sheet 6000
  • 6000 Grade Micro-Mesh® is equal to 4 micron
  • 1- 3" x 6" Sheet 8000
  • 8000 Grade Micro-Mesh® is equal to 3 micron
  • 1- 3" x 6" Sheet 12000
  • 12000 Grade Micro-Mesh® is equal to approx. 2 micron.
  • 1- 3" x 3" Foam Sanding Block
  • 1- 2 oz. Bottle Micro-Gloss® Liquid Abrasive
  • 1- 1 oz. Bottle Anti-Static Cream
  • 1- 3" x 3" Cardboard Sheet
  • 1- 2 oz. Bottle Detergent
  • 2- Flannel Cloths
  • 1- Micro-Mesh® Finishing Instructions for Acrylic and Wood

 

Guidelines for Acrylic Finishing:

To avoid scratching the surface, do not wear watches, rings, or bracelets. Long fingernails should be covered with gloves.

Micro-Mesh® will remove surface discoloration, but not tinting that is throughout the plastic. If unsure, test in a small inconspicuous area.

Keep Micro-Mesh® clean; contamination can cause scratches. When restoral is complete, rinse Micro-Mesh® pieces, air dry, and return them to their original packaging. Micro-Mesh® is reusable!

Use only 100% cotton flannel for wiping. Keep it clean, wash in warm soapy water, rinse, dry and return to the kit box.

Wrap Micro-Mesh® or conventional sandpaper tightly around foam block and hold in palm of hand. Sanding without a block will produce a rippled or distorted surface.

Micro-Mesh® is numerically graded. The higher the number, the finer the cutting action.

Do not work in a circular pattern. Cross your sanding pattern at 90 degree angles from one step to the next, to be sure of total removal of previous sanding pattern. Incomplete removal will result in an incomplete restoral! Damage not removed with the beginning step will most likely remain after the process is complete.

To remove heavy damage from highly curved surfaces, it may be beneficial to sand in an alternating pattern of diagonally, horizontally and vertically, in a straight line motion. This will assist in achieving an even removal of material over the entire surface.

Thin plastic (1/8" or less) may develop surface distortion if sanding the surface creates heat. Work the surface slowly and work wet.

Check your scratch pattern frequently. It is helpful to set a bright light on the side opposite your restoral side. For better viewing on non-transparent surfaces, place the light at an angle.

Distortion

It is always easier to prevent distortion than to remove it! There are two types of distortion that can be caused by the use of improper restoral methods, localized and surface. Localized distortion is caused by working one small spot and not blending the damage removal over a large enough area.

Surface distortion is almost always a sign of incomplete restoration. This could be the result of:

  • the incomplete removal of one sanding pattern before proceeding to the next step
  • not working a larger area with each new step
  • heat build-up
  • skipping steps
  • not cleaning the surface between steps
     

Determine Type and Extent of Damage and Starting Point

Crazing - A series of very fine lines, stars, or haze when viewed at an angle in bright light. Crazing is below the surface and usually cannot be felt with the fingernail. Requires aggressive sanding to remove. Begin with 220 grit wet/dry sandpaper.

Deep Scratches - Easily felt with the fingertip Begin with 220 grit wet/dry sandpaper.

Minor Scratches - Readily detected with fingernail. Begin with 1500 Micro-Mesh®. If the scratch is not easily removed use 400 wet/dry sandpaper followed by Micro-Mesh® 1500.

Hairline Scratches & Light Scuffs - Light scratches and hazing - Begin with 2400 or 3600 Micro-Mesh®

Very Fine Scratches - Usually caused by improper cleaning methods. Begin with 4000 or 6000 Micro-Mesh®.

Crazing is the most common and objectionable problem with regards to aircraft transparencies. It appears to be scratches, either large or small, which when highlighted by the sun show up as bright lines. In reality they are shallow fractures just under the surface layer. Crazing can be classified in two categories, minor and severe. Minor crazing has the appearance of thousands of tiny scratches on the surface. When viewed at an angle to the sun or a bright light, they look like a network of very fine shiny lines, stars or haze. Severe crazing, on the other hand has fewer scratches, but they are much larger and appear to be deep gouges in the surface. In both cases it is rare that these can be felt with the fingernail - they are UNDER the surface. This will be the hardest type of damage to remove. Deep crazing will require sandpaper, possibly as coarse as 120 grit. Crazing removal will take time. An equal amount of material must be removed from the entire surface to prevent distortion. THIS MUCH STOCK REMOVAL CAN ONLY BE DONE WITH SANDPAPER. DO NOT BE AFRAID TO USE SANDPAPER ON YOUR TRANSPARENCY! After damage removal and completion of the sandpaper sequence, the cloudy appearance will be removed as you continue with the Micro-Mesh® procedure.

Step 1 - Damage Removal

Most of the restoral time is spent actually removing the degraded acrylic material. Take your time and make sure that this first step removes all of the damaged material. THIS IS ESSENTIAL! Time required for this step may take 70% of the total restoral process.

  • Determine the type and extent of damage and determine your starting abrasive grade. Open coat sandpaper must be used dry. Wet/dry sandpaper and Micro-Mesh® can be used wet or dry, but best results are obtained if used wet. This will also help keep the surface cool and the abrasive flushed free of abraded particles. Clean fresh water is an excellent lubricant and coolant for Micro-Mesh®. Water may be sprayed or misted on the surface with a spray bottle or Micro-Mesh® may be dipped in fresh water occasionally during use. A drop of mild dish detergent can be added to water for lubrication if needed.
  • Once the starting abrasive grade has been determined, wrap the abrasive tightly around the foam block. Using firm pressure, sand evenly over the entire area in a vertical motion, until the damaged layer has been totally removed. This damage removal step is CRITICAL! If it is incomplete, the final results will not be satisfactory. After 3-5 minutes check your progress. If it seems the damage is not being removed at an acceptable rate, you may want to proceed to a coarser grade of abrasive. In the case of crazing, the time needed to remove the damage will be longer. Since more material will be removed to eliminate damage, you may want to alternate with vertical and horizontal straight line motion. Once the damage has been removed, end with a vertical sanding pattern. DO NOT SAND IN A CIRCULAR PATTERN. Spot sanding in a localized area is not recommended. To remove a single scratch or small scratch area, sand in an area large enough (8" x 8") to prevent waviness or distortion. Work across the damaged area 4 to 5 inches each way from the damage. This may mean sanding the entire surface. Work an area slightly larger (at least 2 inches) with each consecutive step. You may find you are sanding the entire surface before you are finished.

    3. Clean the surface by flushing with water, or blowing with air. This will prevent abraded particles from being picked up with the next abrasive step and causing scratches.
    4. Proceed to the next step of abrasive. If sandpaper was used, it will be necessary to continue through all of the grades listed to 400 grit sandpaper before beginning with the Micro-Mesh® abrasives. Wrap the abrasive around the foam block and sand at a 90o angle from the previous step. Continue sanding until the previous sanding pattern has been completely removed. The approximate time for each step is 3-5 minutes per square foot. If water is being used, it will be necessary to dry the surface completely to determine that the previous pattern ahs been removed. The use of 100% cotton flannel is recommended. Avoid synthetics and paper towels, as these both tend to cause scratches in plastic.


Step 2 - Surface Restoral

  • After the surface has been sanded with 400 grit sandpaper, begin with the Micro-Mesh® abrasives. Wrap the 1500 around the foam block, and sand at a 90 degree angle from the previous sanding pattern. Continue until the previous pattern is again removed.
  • Proceed as above through all grades of Micro-Mesh included in the kit. Be sure to change the sanding direction 90o with each step and check for total removal of each scratch pattern. If coarser scratches remain at any step, they will probably still be visible at the end leaving an incomplete restoral and a hazy finish.
  • When you have finished with the final step of the Micro-Mesh® series, and are satisfied with the surface appearance, clean the surface thoroughly.
  • Apply a dime-size drop of Micro-Gloss® to the 100% cotton flannel or wipe provided. Rub briskly over a 1 square foot area. Work in a straight line pattern. Use firm pressure for 1 to 2 minutes, until Micro-Gloss®has almost disappeared. Water may be added to extend working time. Continue in 1 foot areas, overlapping slightly, until entire surface has been worked. Flush the surface with water and wipe dry.
  • Once the surface has been sufficiently cleaned, apply a few drops of ANTI-STATIC CREAM to the surface and spread over a small area. Wipe off quickly and completely with a 100% cotton flannel cloth. This procedure removes static electricity which could cause dirt to be attracted to the surface. For large surfaces, work 1-1 1⁄2 sq. ft. areas at a time, overlapping each new area slightly until the entire work area has been covered. Do not allow the ANTI-STATIC CREAM to dry on the surface. If it dries, it will be difficult to remove. In hot weather, work in smaller areas.