User manual 3M CARBON STEEL WELD REMOVAL AND BLENDING

[. . . ] Depending on the paint system, available tools and desired outcomes, there are multiple ways and products to choose from in achieving a carbon steel finish that can be painted or coated. The following process is recommended as an excellent starting point for rapidly achieving good finish results on carbon steel welds. 3M Industrial Business Market: Metal Fabrication Application Description: Carbon Steel Weld Removal and Blending page 2 Step 1 3M Fibre Disc 988C Level the weld Right Angle Grinder Step 2 Scotch-Brite Surface Conditioning Disc ACRS Blend the weld Rotary Tool Step 2 3M Stikit Disc 751I Blend the weld Rotary Tool Step 3 3M Stikit Disc 751I Refine the finish Random Orbital Sander Step1: Level the Weld Begin with 3MTM Fibre Disc 988C on a right angle grinder to level the weld. Choosing grade 50 for this step should allow you to proceed directly to blending the scratches in step 2. [. . . ] Selecting a Scotch-BriteTM Surface Conditioning Disc in grade A CRS offers long-life and is a user friendly and "forgiving" option for blending. The 3MTM Backup Pad 917FD is well suited for more aggressive applications and products. For better security, press the disc onto the benchtop and run the tool to help lock the disc in place. The Scotch-Brite disc will not gouge the metal so operators can get good results regardless of their level of experience. This finish may be an acceptable stopping point. Tech Tip: To extend the life of the product, sweep the edges of the workpiece with the disc. An economic alternative to the Scotch-Brite disc is the use of an 8" 3MTM StikitTM Disc 751I, also used on a rotary tool. For maximum adhesion, make sure the backup pad is clean and free from dust. Use a disc in grade 80 to follow the grade 50 fibre disc. This finish may be an acceptable stopping point, depending on the location of the weld or paint thickness. Tech Tip: A rule of thumb when sequencing coated abrasives on rotary tools is that you may skip every other grade in the sequence, as we are skipping grade 60 here. A rotary tool is a quick way to blend scratches from the previous step. It leaves a coarse finish with rotary patterns which may require a thicker coating of paint to cover. Market: Metal Fabrication Application Description: Carbon Steel Weld Removal and Blending page 3 Step 3: Final Finish To generate a finer finish and more randomized scratch pattern, after using a 751I Stikit disc on the rotary tool, add a final step with the same grade of 751I on a random orbital sander. 751I contains 3MTM CubitronTM Abrasive Grain and is a long-lasting alternative to aluminum oxide discs. A 5" disc is recommended, and is available in convenient disc rolls. Tech Tip: When using a random orbital sander it is best to start the disc flat on the workpiece to avoid gouging. Safety Information Always read and follow all safety information included with the product. [. . . ] 3M MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTYARISING OUT OFA COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. User is responsible for determining whether the 3M product is fit for a particular purpose and suitable for user's application. If the 3M product is defective within the warranty period, your exclusive remedy and 3M's and seller's sole obligation will be, at 3M's option, to replace the product or refund the purchase price. [. . . ]