Forum: Story Recommendations

any stories where the teenager finding spaceships /alien tech / nano machines etc please,

Island Mine, by Refusenik -- not a teenager but a college student.
Human Phoenix also by Refusnik. Not explicit, and not really "finds", but it's there.
Accidental Commander by TonyG -- also not a teenager, but similar trope.
Space by John Wales.
Tandra also by John Wales -- the MC is not a teenager.
Finders Keepers by Shakes Peer2B (not teenager).

The New Federation, a series by Monbade, is such a series.