Tina, you answered you own question about how to apply when discussing the fence, a brush.
You probably can't get an oil where you live. I know CA has extremely restrictive regulations and oil is banned in most, if not all, of CA. Someone from CA might come along and say otherwise.
If you want the color of the door, and that stain/coating has performed well, stick with what you know.
As to whether you need a clear coat, that depends on the protective qualities of the stain, and whether it will accept a clear.
You probably can't get an oil where you live. I know CA has extremely restrictive regulations and oil is banned in most, if not all, of CA. Someone from CA might come along and say otherwise.
If you want the color of the door, and that stain/coating has performed well, stick with what you know.
As to whether you need a clear coat, that depends on the protective qualities of the stain, and whether it will accept a clear.