i use 4794 wax and get a slight dip. But we use a daisy mold from wilton and the dip leave it look kind cute. So my wife says. So i leave them that way.
That is how i pour mine is over the back of a spoon. Lower the chance of melting the lower color comes out great. I always pour the dark color first. Like for are honey suckle lavander, i pour purple on bottem then yellow on top.
we use 4794 for are tarts and i get good throw cold or hot. as for warmers we buy them from jd wholesale and get them for like 7 to 8 dollars and they are the combo heats. We retail them for 19.99 and they sell great. Sold about 10 in the first 3 weeks of getting them.
you can pour the second color over a back side of spoon. pour a thin layer let it set a little and then you can pour the rest should come out a perfect split in color.