Or you could just apply them dry.  

Just saying.......

Dry: (as a one person application)
Line the decal up, cut off half an inch of the backing paper from the edge and stick it down gently on the cabinet. This is your alignment phase.

Once satisfied with all aspects of alignment, use a soft cloth or wear one felt glove and smooth out the decal pushing FROM THE CENTRE OUTWARDS.

Peel away another inch or so of the backing paper and repeat.

You'll be done in 30 minutes tops for each of the main cabinet side decals and 15 each for the coin door and backboxes.



No dealing with liquids so no squeegeeing.
Cabinet/backbox can be flipped over immediately to do the other side. No waiting around for it to dry.
Can be trimmed straight away. No drying time needed.

Temptation to adjust the decal (and potentially ruin the decal) is removed. Line the decal up correctly the first time and you don't need to adjust it anyway.