The chipping effect is done w/ a piece of foam from a blister pack. Just tear it and tap lightly w/ Chardon Granite over your base coat. Think of sponge painting a wall but only hit the corner/edges where this type of chip is likely to occur.
The streaks..you won't get those effects with acrylics (at least not easily). Oils have a very long work time and can be rewet with turpenoid (thinner) and pushed/pulled even more after drying until they are sealed.
Oil paints are actually a pretty good value You can pick up a small tube of lamp black and burnt umber (at Micheals) and a pint of turpenoid at a hardware recreate a lot of the effects you see for ~$10 USD.
Remember to seal over any lacquer or enameled areas with a water based sealer before the oils. A lot of modelers use Future floor wax sprayed through an airbrush but you can brush on a gloss/clear too.
Here is a close up of sponge chips done on my Raven and Valk