Automotive Refinishing

SOP - Primer Sanding

• Prepare primed areas for application of basecoat/clearcoat.
• Refine scratches and featheredge primer into surrounding area.

Mirka Abrasives recommends the Unique or Best product for these applications. To customize your SOP, click the color coded box to choose the Good/Better/Best/Unique product for each step.

PS1

Dry Guide Coat - Black
9193500111

Follow manufacturer’s instructions for primer application and cure times.

Apply Guide Coat to highlight the repair area.

PS2

Autonet® P320
AE-570-320

MR-38CV-1
(3" x 8" Vacuum-Ready Orbital Sander)

*Also available in 5" & 16-1/2" lengths

Q.Silver® P320
2B-663-320

AF4418 DuraBlock - Grip
(2-5/8"X 11")

*Also available in 5-1/2" & 16" lengths

Gold P320
23-663-320

AF4418 DuraBlock - Grip
(2-5/8"X 11")

*Also available in 5-1/2" & 16" lengths

Basecut® P320
22-663-320

AF4418 DuraBlock - Grip
(2-5/8"X 11")

*Also available in 5-1/2" & 16" lengths

Using the MR-38CV-1 orbital sander, sand using P320 grit to level the primed repair. Alternate sanding direction to avoid creating deep, straight scratches. If  bare metal or filler shows through  the sanded area, it must be re-primed.

Use an DE-1230-PC portable dust extractor or other dust collection system when sanding.

PS3

Dry Guide Coat - Black
9193500111

Re-apply Guide Coat to highlight any deep sanding scratches.

PS4

Gold Soft P500, P800
23-645-500, 23-645-800

MRP-650CV 
(6", 5mm orbit)
916GV48 Backup Pad

Q.SIlver® P500, P800
2B-611-500, 2B-611-800

MRP-650CV 
(6", 5mm orbit)
916GV48 Backup Pad

Gold P500, P800
23-645-500, 23-645-800

MRP-650CV 
(6", 5mm orbit)
916GV48 Backup Pad

Basecut® P500, P800
22-622-500, 22-622-800


MRP-650CV 
(6", 5mm orbit)
916GV48 Backup Pad

Using the Mirka® PROS sander, featheredge and refine the 320 grit scratches from step 2 with P500 grit discs.

Metallics and other topcoats that are susceptible to showing primer scratches should be followed by P800 grit.