2 POSSIBLE PROBLEMS: 1ST - SPARK SWITCH ON ONE OF THE BURNERS GOT STUCK, OR 2ND - SPARK MODULE IS BAD. HERE IS THE VIDEO INSTRUCTION HOW TO DISASSEMBLE KITCHENAID COOKTOPS AND HOW TO REPLACE THOSE PARTS. HOPE IT HELPS.
IF YOU DONT HEAR IT CLICKS, MOST LIKELY PROBLEM IS WITH SPARK MODULE, IF YOU HEAR IT DOES CLICK, BUT GAS DOES NOT IGNITE, CHECK IF IGNITERS FOR CRACKS OF CERAMIC INSULATION, THEN ITS BAD IGNITER. IN SOME CASES IT MIGHT BE A SPARK SWITCH. JUST TAKE A LOOK AT THIS VIDEO, IT WILL GIVE YOU AN IDEA HOW THEY MADE, AND WHAT MIGHT BE WRONG. HOPE IT HELPS.
Is there directional grain..? I have removed small imperfection in stainless look by gengtly rubbing only in the same direction as the existing grain.. and be careful sometimes the repair is worse than the issue..