I am going to sound like a big stick in the mud here , I am just trying to add some facts from my own experience , others may have better success with this glass paint -  I also tried that EXACT glass paint on my Scared Stiff , Red & Green area's - ans it didnt blend very well at all and was very 'blotchy' and I can spot the same effect in this BR cab.

Whilst that BR cab looks a lot more colourful - take a look at the RED in the main cabinet diamond and lettering and you can see the blotching that occurs.