One To One Rotary Tuition - BMW M3

[imported_Dave KG]

Not a full detail today, but rather a few hours of one to one (or rather two to one, as Gav had to put up with both me and Bryan!! :lol::lol rotary tuitiontoday for GavB on the forum, on his really rather nice BMW M3 'vert. Lovely colour too, dont see many around in a metallic, amost British Racing green.



For an 11 year old, the car wasn't badly swirled either...

The whole bonnet was like this, with random deeper scratches around as well which would give opportunity to play around with a little heavy compounding techniques and also some wetsanding.



After a little product trialling, we found that for the general swirling, Menzerna Intensive Polish on a Meguiars W8006 polishing pad delivered some very good correction. So after a quick demo from me, using the Zenith Point technique:

• Spread at 600rpm, 1 pass
  
• Begin to work at 1200rpm, 2 or 3 passes
  
• Work at 1500rpm until residue clear, around 8 - 10 passes
  
• Refine at 1200rpm, 2 - 3 passes
  

Satisfied with the correction, it was over to Gav who took to the machine like a duck to water in honesty... Not his first time with it, but all the main things were observed:

• Pad flat
  
• Movement steady, no fighting with it
  
• Relaxed arms to flow with contours
  

A couple of pics...

Short video - note the movement speeds, relaxed steady movements, and the pad being flat...







Seemed to work well for Gav, the finished results...

Gav then refined the area with Menzerna Final Finish.



Starting out you see the residue is very cloudy and grey:

Once worked, the residue turns clear to show the polish has broken down and has been properly worked...

Damn good finish, I would say...

 

[imported_Dave KG]

The middle region of the bonnet had some deeper scratches, so it was time for a diofferent approach to machine polishiong - the Cut & Dash method of hitting the panel hard and fast with an aggressive compound, and then refining with a dedicated finishing polish in a separate step. When dealing with more severe marring, this is my favoured way rather than using medium polishes with the Zenith method, as you can use compounds to get the correction and then stop when the correction is achieved and then refine with a dedicated polish to get the best possible finsih.



So, demonstration for Gav with Power Gloss on a Meguiars W7006 cutting pad, as follows:

• Spread at 600rpm, 1 pass
  
• Begin to work at 1200rpm, 2 - 3 passes
  
• Work at 1500-1800rpm until defetcs removed
  

Couple of pics of PG in action...

We'll refine this later, as one thing we noticed was a deeper mark that was not removed by compounding...

So, wet sanding time. Abralon 4000 grit pad on the Porter Cable, about 5 or 6 passes at speed 3 with no pressure at all (pressure can lead to deep pigtailing which is defficult to remove)... Resultant sanding haze:

Polished out with Intensive Polish:

 

[imported_Dave KG]

Gotta hand it to Gav, he tried everything - so had a shot of wet sanding as well:

Sanding haze:

Polishing it out...

After refining the whole half of the bonnet, we checked it under the Sun Gun, video:









Onto the other half of the bonnet and it was a turn for 3M so Gav could see and try in action the two polish ranges he had...



Bryan explains some pointers to Gav...

Again, we went for the "Cut & Dash" method of Fast Cut Plus to correct, followed by Ultrafina SE to refine. What follows is a video of me using 3M Fast Cut Plus to correct... Note the speed of machine movement is a lot faster than a DA, and the work time is only as long as is required to correct the marring, no effort to finish was made:







The finish wasn't bad though...

(Tilting Sun Gun can highlight RDS and also faint hologramming, which is why its tilted in one of the pics above)



But still, its was refined. Gav also had a go of Fast Cut Plus.



As time went on, Gav seemed to be rather comfortable with the rotary - opne handed use in fact:

:lol::lol:



Although, this does demonstrate a very good point! With a rotary, the vast majority of the work is done with your back arm, your driving arm (which is typically your writing hand). The arm on the head of the machine is there simply fora guide and also for any additional pressure you want to use (or take away by lifting slightly).



Gav also wanted to see Zaino in action, so I asked if I could do a 50/50 on his bonnet and let him see my two favourite sealents side by side: Zaino and Duragloss. To ensure fairness, the second half of the bonnet was re-refined with Menzerna Final Finish to ensure consistency... This gave Gav a chance to see Bryan working the rotary too, to see a slightly different but just as effective rotary technique (Bryan moves the machine slower than me, and typically uses slower speeds... but this is all personal preference at the end of the day to what methods you prefer, and aside from that Bryan and I share a very similar machine technique - probably because we learned the rotary together!!)

Gav back in action refining the bonnet...

 

[imported_Dave KG]

One fully machined, we wiped the bonnet down with Menzerna Top Inspection ready to receive the sealents... Same deal as at the NE detailing meet yesterday, driver's side received Duragloss (601>105>111) and passenger side Zaino (Z1>ZAIO>Z2)...



Duragloss

Zaino

Some more pics...

No difference in looks was obvious, but then there never is with two products side by side on a single panel in reality... We couldn't separate them in water performance either... Bryan commentates his thoughts in this video, along with Gav...







And just for fun at the end... some beading pics:

 

[ajnavo61490]

wow, what a great write-up!



EXCELLENT RESULTS!!!

 

[SilverSeven]

Thank you so much for the time & effort on a wonderful write-up Dave. Very informative and great pictures & videos. Thks.

 

[somebody]

Great write up I am looking into getting a rotary so I will be revisiting this thread a lot.



-Brandon

 

[rwisejr]

Great write up !!!!

 

[Eisen Hulk]

Top notch work, Dave. I always enjoy your posts and write-ups.

 

[RTexasF]

Exceptionally well done. Your hard work on this entire piece has helped to calm my stomach in regards to using a rotary. Thank you.

 

[mixxmstrmike]

Excellent write up! Thanks for taking the time to document your process. This thread is great reference.



-Mike

 

[mr.ikon]

I wish I had two experienced people with the rotary teach me when i first started out. Would have been quite an experience. Awesome work you guys.

 

[Evenflow]

Amazing job!! Great write up as well.



I wish I could control the rotary like that, mine seems to want to jump all over the place all of the time..

 

[Binzes]

Awesome write up! I actually just tried my hand with a rotary for the first time ever last night.





And it just so happened to be a Makita 9227 on my e36 m3. Thanks for the tips, I was planning on working on my hood today just for a little more practice and this thread is a great help, especially the videos.

 

[BuffMe]

Awesome job and great writeup!

 

[imported_DJ Mayo]

Awesome pictures and nice write-up thanks.

 

[jwgarrison]

Splendid!! Just splendid!!!

 

[joseph-98]

great write-up and very informative. Many thanks!

 

[Rickrack]

Very nice write-up Dave! I always enjoy reading your posts.



Great pictures too!!

 

[Junebug]

Dave, you should do a DVD - it would be great!