The tourists ended a woeful campaign in England with some overdue joy on Monday as a 49-run win in the fifth and final one-day international at the Ageas Bowl ensured a 2-1 series success.
While that will fail to hide the shortcomings of a 3-0 defeat in the Tests, Australia coach Lehmann wants to use it as a springboard to greater things, with an ODI series in India and the Ashes on the immediate agenda.
"I am really pleased with the way they played throughout the one-day tournament even though we had a few rain-affected games but I thought we played pretty well," he said.
"It gives us some confidence and we can go home and get back into the Indian one-day series and then the Ashes."
Despite the humbling Ashes scoreline, Australia proved more than competitive on these shores and had genuine chances of victory in four of the five Tests.
While Lehmann acknowledged their deficiencies in some areas, the former batsman is full of optimism ahead of the return series, which gets under way on November 21 in Brisbane.
"We are very confident but we know we have got to improve in some areas - especially with the bat," he said.
"The way we played, especially in the last three Tests, we were very, very good except for two hours in Durham. We just need to be consistent and grab the big moments and we know that.
"Everyone says it was a close series but we still ended up losing 3-0. It was closer than people think but at the end the result was 3-0 so we have got to improve.
"We know the conditions at home will probably suit us better than England but we have got to play better cricket."
The recent form of mercurial fast bowler Mitchell Johnson in the one-dayers has given Lehmann reason for cheer.
Johnson, who has been in and out of the Test side due to several erratic performances over the last couple of years, bowled with pace, hostility and accuracy to unnerve several England batsmen.
And with several seamers either out or doubtful for the start of the Ashes, the left-armer is now firmly in the running for a first-team spot.
"Johnson bowled fast the whole time and as long as he is consistent that is all he has to do so I am really impressed with him," Lehmann said.
"He has put a strong case but he has got to keep backing that up like every other player. They have got to perform and perform at the level we need to compete against good sides."
One potential area of concern ahead of this winter is the long-term fitness of captain Michael Clarke, who played on Monday despite suffering a recurrence of his chronic back problem.
Clarke underlined his importance to the cause with a valuable innings of 75 on the south coast in a stand of 163 for the fourth wicket with Shane Watson, who hammered a match-winning 143 off 107 balls.
Lehmann, however, is not unduly worried by Clarke's injury struggles.
"He will go home and get scans or whatever he has to do and then if he is not 100 per cent fit we have to wait and see," he said.
"(On Monday) he said he was fit to go and you take his word on that. We'll get back home and check it with the medics and see how he goes from there.
"He has had it for a long time. Dealing with a new coach and a chronic injury. I am pretty pleased he got through the series albeit very lucky to play (on Monday) but he played and led well."
England attracted controversy in some quarters for resting several star names, including captain Alastair Cook, for the ODI series, preferring instead to give untested players a chance at international level.
When asked for his opinion on the matter, Lehmann added: "I don't really care what England do - that is their choice. From our point of view we are out to win every game we play and we achieved that goal of winning the series."