Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to paint circles [title] Choose your graphite. [step] A very light shade of graphite is ideal to prevent the marks from showing through your paint. This is especially important if you paint with watercolours or other thin paint, which requires a 6h pencil or an even paler option.

Ending1: [substeps] It's okay to have faint pencil lines showing through watercolour, as long as they aren't too obvious. Some artists even use this intentionally, sketching in pencil then applying a very thin wash of paint over it. Ending2: Instead, choose a graphite that is black and puffy in order to achieve the exact shade you want. You can also try using an almost-iridescent shade if you wish to make this look natural and your first attempt will be successful. Ending3: If you use a pencil, you can get it to be that much brighter by dipping it in a uniformly colored graphite darker than you want your circles to be. [substeps] Graphite is best available in a professional or daseous paint altered with oils. Ending4: Darker grades can produce a whole lot of interesting colors, but very few will be symmetrical, making them much more expensive. [substeps] Refined graphite is much cheaper than lighter grades.

Answer format: ending1/ending2/ending3/ending4