Can anybody suggest wheather i can do this cake with color mist...or it is safe to mix each color and cover the cake. Need ur suggestions.

If your going to use crusting buttercream. you can use a paper towel on one side then mist.. color mist will leave ALOT overspray.. so before you spray your cake and BEFORE you ice your cake.. place wax paper underneath the cake.. ice the cake and then spray.. that way you can just remove the wax paper and your board is not touched with overspray. just remember LOTs OF OVERSPRAY!! Or you can get a piece of card board and place it gently on your cake.. you can smooth out the line with your finger dipped in cornstarch when your done.. (only if your using crusting buttercream) GOOD LUCK!