Hellow guys, i been making SMBC and only so often does it come out correct. However i have gotton a new issue and that issue been the SMBC is coming out a of yellow and it dont look really appealing however lets jsut say taste better then it looks. I wanted to know what the issue could be? aldo im finding that if i look on the outside of the buttercream i can see it has a water residue like a overcoat and its not holding in the bowl.

Sounds like it's not emulsified all the way and there's not enough air left inside. Try whipping the crap out of it and make sure it's not cold at all - like 72 degrees.