Gunze Mr Metal Color Drying up in Bottle ...

Hi , My one bottle of Mr  Metal Color is drying up in the bottle. When this happens with other Gunze Non-Metalic colors (Mr Color), I just add Mr Color Leveling Thinner and all is good; however,  The smell of  Metal Color leads me to believe they are not the same formula.

Any ideans how I can revive this bottle of metal color? Thanks.