White is a really hard color to paint, because of the chalky nature of the pigment and the way light catches any imperfections.
The first question is what color you're trying to cover. If it is very dark, try putting a layer of grey first.
Second, are you trying to do it in one coat? Unless you're covering white primer, this is impossible, using any brand of paint. Instead, thin it way, way, way down. Use lahmian medium (if you're staying with
gw) or 20:1 diluted liquitex flo-aid (better). If you're covering a dark color, like black primer, expect for each coat to look crappy and translucent until you hit around 5 or 6 layers.
It is critically important that every coat is brushstroke free.
Also, using a flat or filbert brush is much easier to cover than a round. Absolutely do not use a detail brush (size 0 or smaller) to cover a large area. And, you can use white scar in many cases, which takes a little less thinning (but still many coats).
Finally, don't be impatient let each layer dry completely before the next layer. If all else fails use a 2000+ grit sandpaper between layers and cheat.
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queen_annes_revenge wrote:See i found ceramite white better then the layer white, white scar is it? The white scar was always lumpy but i found ceramite was smooth
I'm pretty sure they are the same except for the dilution level (scar has less pigment and more medium). Check the date of both; maybe one is older.
By the way, I cheat: I have a dropper bottle that has mix of Vallejo white (not the foundation one) with flo-aid water (20:1 dilution). The mix is very eyeball but probably 1:1. It is very liquid; probably as thin as I can get without making it a wash.
If I'm paintings small area like a visor lens, or eyes, I will use slightly diluted white scar (just with water)