I can tell you how to make blue laced gold cochins. Ok first get some blue or splash cochin bantam hens. Then get a gold laced male, maybe two just to be safe. Cross the GL to the blue and keep all the blue daughters from that, more than likely they will be solid blue with a few gold flecks. Breed those back to a gold laced rooster. In my experience with this kind of project you will get about 75% laced birds and the other 25% will be solid black/blue. The laced birds will look good but some of the lacing wont be complete. You breed the blue laced gold females back to a gold laced male and breed the blue laced gold males to gold laced females. That will give you blue laced gold. For blue laced red you will have to introduce the mahogany gene which I dont know how to do. That would be the better way to get birds that would be pure so you wouldnt have to worry about regaining type and all that.
Another way would be to cross in BLR wyandottes but you have the clean legs and rose comb to worry about.
For blue partridge it is a similar deal, breed blue females to partridge males, keep the F1 daughters and breed them back to a partridge male. Keep the offspring from them and mate them back to partridge.