If you really like his markings, get an ENCHI female to breed to him eventually. His markings are very enchi like already.
Also get an albino female. Then in a year or two, get a black pastel het albino male. BANG your project is off to a good start.
Of course, by that time you may decide not to stud your normal male at all (poor normal males never get no lovin') ... you can put your black pastel het albino to your enchi and have a chance to make black pastel enchi 50% het albino. With any luck, you make a male and then a year later you pair him with your albino and with a lot more luck ... bang black pastel enchi albinos!