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Two goals in the last 10 minutes denied Welling a victory that would have left them on the verge of winning the Blue Square Bet South title.
They remain nine points clear at the top of the table after hosts Staines hit back to snatch a 2-2 draw.
Ross Lafayette's (pictured) double had put the Wings in charge.
He opened the scoring five minutes before half-time and doubled the visitors' advantage seven minutes into the second half.
Welling were cruising until Dan Brown pulled a goal back on 80 minutes.
Staines pushed forward and equalised four minutes later through Louis-Rae Beadle.