Hey people, I'm new with gels but anyway, I'm making a VS map, in the map will be a prepainted track so the question is... how to make prepainted track? With speed and repulsion gels... I dont know how to do it...

You can put in gel emitters that activate in whatever direction you want with spread/gel type/number of blobs/speed. Just make them activate as soon as the map starts for about 5 seconds and by the time the player gets there you will have a normal looking, prepainted area. Use an info_paint_sprayer and change the properties, then set up a logic_auto to turn them on on the map spawn and then off again in about 5 seconds (set the delay to 5.0)

I think you can use Paint_Sphere (not entirely sure of the name) entities to do so, though you will have to fire the paint input.

You can also place several prop_paint_bombs over where you want your track to be. They should just spawn immediately and fall right down.