>>6392352This is about how badly painting can go, but guess what? COMPLETELY FIXABLE!!!. strip it and do it again. Thats the great thing about painting, you don't need to go through tons of kits practicing your skills, you just keep trying until you got it right because you can return the model back to how it was before your painting went wrong. Also please bear in mind that just because you can't 'thin' spray paint, it does not mean it is a cruise control for instant good. You still need thin layers of paint, not one thick layer spraying until the color is fully solid.
Seam Welds on the other hand are hard to screw up but mistakes do happen and a slight spill like from too much cement on the brush spilling out of the seam does sometimes happens. And unlike paint, cement will physically alter your part's surface within seconds of hitting the plastic making it hard to clean up fast. It is still something that can be fixed, you have to wait an hour or two for the plastic to reharden before you sand down the rough surface caused by the cement. Worst case scenarios might result in reduction of sculpt details on the part, but that is it.
Seam welding seems really scary first time, but it is quite easy. just avoid the joints.
cant answer much on the paints and you will find that doing your own kits is a very relaxing and great experience.
the other ones I will leave to the guide