Rotor query

[runsgrateasanut]

I have just received a set of Distributor Caps and Rotors marketed as being OEM.

The image of the rotors looked a little strange and on receiving these I'm baffled.

The rotors look much  the same I imagine as my used Rotors will look when and if I get around to changing them

The Arm has a deposite  on its end,   quite noticeable and I'm wondering if this is some sort of preventative layer that keeps the brass in top condition re oxidisation until used? No mention anywhere.

Never seen anythign like it before and asking the seller to explain.  Both the Rotors and Distributor caps are maked as Denso. The Rotors in boxes with "Lexus Genuine Parts" and a Barcoded data sticker, - but...............

The Caps are just in bags with a Toyota Label and sticker info

Be aware if you consider ordering or let me know if this is common practice for this part to be coated?

https://www.ebay.co.uk/itm/Lexus-Genuine-LS400-Distributor-Rotor-And-Cap-Set-1990-1997-NEW/263229509998?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

[runsgrateasanut]

Thought I'd add a couple of photo's.  Only one pos F/B and no Negs for these and a number sold - wonder why?

Bizarre as rest of Brass is clean and Unit looks unused.

 

[ambermarine]

Stuart

The coating is probably put on when the manufacturer packs them to prove origin and no previous use, if it comes off with little effort the other reason will be corrosion prevention on the contact surface that hits the carbon segments in the distributor cap.

Denso is 50% owned by Toyota and supplies other car manufacturers,so this will be a genuine OEM.

[runsgrateasanut]

Thanks Phil,  I'm pretty sure you are right that it is a protective coating. The seller doesn't know the reason but tells me he buys the parts from a Lexus Distrbutor.  I have suggested he asks if it is normal.  Having looked at Google images I've not seen a single Rotor with this on it and from memory Mercedes never supplied parts coated.

Pretty sure it will remove easily but as weather very inclement and parts likely to sit under Boot mat until necessity forces me to do a bit of work, I'll leave on the protection.

[runsgrateasanut]

Correction - this image  looks as though it has a protection coating.

https://www.bing.com/images/search?view=detailV2&ccid=Wa%2Fyq0nR&id=86E9F382A6F23A2E1A4005821F1751B0C2620201&thid=OIP.Wa_yq0nRUAFsaYtSI45z8AHaHa&mediaurl=http%3A%2F%2Fi.ebayimg.com%2Fimages%2Fi%2F221681113392-0-1%2Fs-l1000.jpg&exph=1000&expw=1000&q=toyota+distributor+rotor&simid=608018650032440998&selectedindex=20&ajaxhist=0&vt=0