Roratry Disaster . . . ALMOST!

fdizzle

New member
Decided to jump right in after watching videos and buffing a few junk panals as test subjects with the wolfgang/LC euro curved pads and the optimum line . . . .



Did a blue Minicooper and used my new Hitachi Rotary with Optimum Compound and Optimum Polish - cars so dam small and I had only one line of pads so I ended up using teh PC on most of the finish, but hit the hood and rear bumper with the roatry.



Hood = Flawless :cooleek:



Bumper = Burned the S&^% out of the paint. :soscared: :help:



Now, after soiling my pants, and taking a closer look at the bumper, I noticed fish eyes and trapped dirt in the paint, and an overall different texture to the paint on the bumper vs. the rest of the car. :nervous2:



I found it odd that the same motion, speed setting and product combo, even though its a rotary, ate the paint up so badly. I switched to a cutting pad and the Hyper Compound to try and improve the effected area after the paint cooled, and though it did make some improvement, it was still badly marred and chewed up down to the base coat. :grrr



Seems that the guy I do this for buys these vehicles from auctions, and the bumper was redone by some crap bodyshop that didnt do the job correctly . . . :doh



Thankfully, the bumper will get redone, as the contact that sold my customer the car has had problems with work from this particular shop, and I wont halft to pay a dime. :bow



Hopefully my first and last burning incident with a rotary. . . . :nomore:



though you would all get a kick . . .
 
actually no, i took some pics of the finished results, which i have yet to put up . . .but none of the jean-claud van damage . . .
 
Yes you've got to take extra care between different body panels...Panels such as the hood (metal) will absorb heat better than the plastic which heats up quite easily. I couldn't believe how warm the paint gets with a rotary on relavilty small speeds....You really do have to be carefull!!
 
fdizzle - what rpm's were you using and pads? I just bought a Hitachi as well, should be here next week :grinno:
 
following directions on the optimum bottle and suggestions from accumulator . . .



OC with orange lakecountry/wolfgang 7.5 inch curved eurotech pad

OP with whote lakecountry/wolfgang 7.5 inch curved eurotech pad



speeds : spread polish at 600 rpm, buffed and worked product at 1300 rpm (inbetween 2 and 3 on the hitachi)



the main reason the bumper burned was the fact that it was painted days prior to me hitting it with the rotary, and the clear was contaminated with another chemical agent which prevented it from curing correctly . . . the body shop did not even polish the paint . . . it had fish eyes and dust all over . . i wish i took a pic of the bumper. Hyper Compound with a yellow pad at about 1000 rpm improved the damage, but parts of the clear were already off. . .



you will like your polisher . . . . good luck! . . .
 
mcnab said:
Yes you've got to take extra care between different body panels...Panels such as the hood (metal) will absorb heat better than the plastic which heats up quite easily. I couldn't believe how warm the paint gets with a rotary on relavilty small speeds....You really do have to be carefull!!



Exactly, I never uses anything stronger on bumpers then a polishing pad and a polish like IP. Move quickly over the bumper so no heat is generated. Most of the times only use a fine polish like Menzerna final finish.
 
I had a rotary disaster on the front bumper of a Mazda Protoge5... Buffing along, and BOOM! It catches the edge of the pad, and the machine gets ripped out of my hands, along with the paint being ripped off the bumper!



!%#@!!!!! That was a $280 mistake :(
 
Yeah the combination of fresh repaint (let alone a bad one) and plastic panels can mean trouble. But note that the front bumpercovers of my Audis have been repainted and I've used the rotary with a decently abrasive product (3M PI-III RC 05933) with no problems, just have to keep in mind what mcnab mentioned about how plastic doesn't absorb heat the way metal does- big difference on the Audis, between plastic and aluminum! But then I waited for a few months before I did any correction on those plastic panels too ;)
 
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