I have been noticing a lot od the really good customs use watercolor pencils and pastels. I have a few questions.
What is a good brand (I don't have a lot of money). Would a cheap brand work as well for practice?
What brand of pastels and would a cheap brand work for practice?
How do you seal it? Can you use a brush on or will it wipe away the watercolor and pastel?
What happens if it gets wet or damp before it's sealed?
Lastly what is a good brush and brush size?
I can answer a few of those questions:
I use Derwent watercolor pencils. They are really high quality and just brilliant! I love using them. They aren't cheap, but you really want to use high quality materials or else they won't work well. On Amazon, you can get a 24 pack for about $20, and you get a nice range of colors. I prefer the 36 pack, but that is $40, so it really depends on how much money you have to spend. They will last you awhile, though, if you mostly use them for face-ups.
What I love about watercolor pencils is they are easy to get rid of should you make a mistake. You just dab them with water and they are gone, much better than using an eraser that has a potential of leaving behind residue. However, that means that if you get water on them before sealing you can end up losing your work, so work and layers.
For pastels, I can't tell you too much, but they must be soft pastels, not oil. I own the Reeves's brand of soft pastels and they work relatively well, but they aren't the best. That's about all I can say on the subject since I'm still experimenting, but like the color pastels, whatever you get will last a LONG time if used mostly for face-ups, so if you need to buy a more expensive brand, it will be worth it.
Finally, sealants. You can not use brush on sealants with pastels. You will ruin your work. The sealant I use is Luquidex. It is non-toxic, though you should still be outside when spraying with it and something to cover your mouth and nose wouldn't hurt. It works well, and it only costs about $25 for a large spray can. You can pick it up at your local Michaels. It's safer than using MSC, which is the preferred doll customizing brand.