Or not so perfect in this case...

Image source, Getty Images

F1 journalist Dan Knutson in Barcelona: "Romain Grosjean has been out on the track again, and now has done a total of 21 laps. He had completed 13 before the wing failure."

Romain Grosjean also returned to the track a few minutes ago, making his first appearance since that front wing failure this morning.

The move into the final hour has ushered in an increase in on-track action has suddenly increased. Seven cars out now, including Sebastian Vettel, Marcus Ericsson and Pascal Wehrlein.

Lewis Hamilton is a machine.

Image source, Getty Images

The Red Bull is not out on the circuit at the moment, just Lewis Hamilton and Sebastian Vettel. A little pre-season testing showdown between two drivers who will likely be battling alongside each other a fair bit this season.

Lewis Hamilton will need to find more than half a second if he is to pip Sebastian Vettel into top spot on the timesheet, with a shade over one hour left.

F1 journalist Dan Knutson in Barcelona: "Christian Horner met with the media this afternoon and was asked about his first impressions of the Red Bull RB12, and progress made today.

"'The first impression of the car is that it certainly stands out,' he said. 'It is a very distinctive new livery, and initial impressions of the car certainly are positive. As an evolution from RB11 it feels very familiar to Daniel Ricciardo, addressing some of the issues we have been looking to address during the winter. 

"'But it is still very early days, so it is very much runs where we are understanding the car, getting the data, understanding the performance and how the car is behaving.'”

Image source, Getty Images

Here's a closer look at Williams' FW38. Last year's car was strong on high-speed circuits but struggled on slower ones, as well as in the wet. 

The team are confident they have addressed that for this season, but we might not see any significant improvement until Australia, with further updates planned between now and then.

1. Sebastian Vettel - Ferrari - 1:24.939

2. Lewis Hamilton - Mercedes - 1:25.409 

3. Daniel Ricciardo - Red Bull - 1:26.044

4. Valtteri Bottas - Williams - 1:26.091 

5. Carlos Sainz - Toro Rosso 1.27.180

6. Jenson Button - McLaren - 1:27.691

7. Marcus Ericsson - Sauber - 1:28.122 

8. Romain Grosjean - Haas - 1:28.399 

9. Alfonso Celis - Force India - 1:29.406

10. Pascal Wehrlein - Manor - 1:29.824

11. Jolyon Palmer - Renault - 1:31.351

Into the final 90 minutes of practice. Are Haas and Romain Grosjean going to get out before the end? They are still trying to sort out that front wing after it came off this morning.

At the moment, it is just Lewis Hamilton and Alfonso Celis out on the circuit.

Here's a good question from the good people at Question of Sport, which links very nicely with Niki Lauda's birthday.

Great picture.

Image source, McLaren

A half-century of laps so far for the McLaren. I'd be keen to know what Fernando Alonso's thoughts are. He is unlikely to settle for another season like the last one and early signs are a little encouraging. 

Button is 2.8s off pacesetter Sebastian Vettel, but that is a whole lost better than the first test last year, when Fernando Alonso was 18 seconds off the pace and had completed just six laps across the whole day.

Lewis Hamilton, closing in on completing the equivalent of two grands prix in one sitting, finally heads in after a mammoth session, leaving four drivers out on the circuit, before Jenson Button takes that number back up to five as he re-emerges.

Look at this from Lewis Hamilton, he's completed double the laps of anyone else. 

1. Lewis Hamilton 115

2. Marcus Ericsson 57

3. Carlos Sainz 55

4. Daniel Ricciardo 52

5. Sebastian Vettel 50

6. Jenson Button 50

7. Valtteri Bottas 49

8. Alfoso Celis 30

9. Jolyon Palmer 21

10. Pascal Wehrlein 19

11. Romain Grosjean 13

Image source, EPA

Lewis Hamilton is all alone on the circuit at the moment, just completing his 111th lap. A good showing from the world champion and it will be interesting to see what Nico Rosberg does tomorrow.

Rosberg finished the season strongly, with Hamilton's form tailing off after he won the title. A cause for concern?

"Of course, I love winning and that's always the goal - but to be honest my attention was elsewhere at that point," Hamilton said.

Oof. I'm sure Rosberg will be determined to prove that he wasn't just beating Hamilton because 'his mind was elsewhere''.

Interesting, interesting. 

Remember if you fancy having a go at producing your perfect livery, use the template below.

Image source, .

Four drivers out on the circuit, one of them Lewis Hamilton. Most of the 11 drivers have been in and out regularly but the one constant has been Hamilton, who passes 100 laps for the day.

If there is anything he doesn't know about the car after today, it won't be worth knowing.