NEVR-DULL Wadding Polish
Inside the NEVR-DULL tin
Before and After Polish Comparison
KX250 Engine before polish
KX250 Engine after polish

Do you think it was worth the effort to polish the motor?

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Sure do, it looks great!0%
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No way, who cares what your engine looks like!0%

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Nevr-Dull wadding polish review
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NEVR-DULL Wadding Polish

While I had the motor out of the KX changing the crank seals, I heard about this stuff from a friend. It's a cleaner / polisher and he thought it might be a good product to clean the grime off the crankcases and restore them to their former glory.

I'd already degreased and pressure washed the motor, as well as given the case halves a healthy scrubbing in petrol while I had them apart, but I wasn't overly satisfied with the
results. So with not much to lose, I headed out to the local auto parts store and picked up a can. (Actually I had to go to three stores before I found one who wasn't sold out)

As the name says, it's a wadding polish, which means it's a fiborous cloth/cotton material, impregnated with the polish. You simply tear a bit off and get to work.
NEVR-DULL Polish
Inside the tin
According to the instructions, you rub the area until all the dirt is off, then buff it to a nice lustre with a clean, dry cloth. In practice, at least with a grotty crankcase stained with baked mud, the rubbing takes a bit of effort.

I gave the whole case a once-over, and I was surprised how much better it actually looked. It wasn't anywhere near as clean as if it had been treated in an acid tank, but it looked appreciably better than it had when I started.

After a bit of a break and a cold beverage, I came back to the job and noticed all the little fiddly bits I hadn't got to, and I decided to do those areas too. As it's not all that easy to get into some of the nooks and crannys, I ended up spending longer on the small areas than I had on the rest of the case. Once I'd completed a couple of the finicky bits, I stepped back for an overall look at my work and instantly saw a problem - the little bits I'd spent the extra time on were far cleaner than the rest of the case!

So began the real labour. Starting with one small area, I began working my way around the crankcase, never starting a new area until I was satisfied with the last. It was tedious, time consuming work (and hard on the fingers at times too), and I recommend you don't try and get it all done in one sitting. Take a break when you're getting sick of it - 10 mins, a couple of hours, a day or two - whatever you need so you don't just rush it. If you stick with it, the stuff gives a very nice result.

Although it's a lot of work, at $9.95 for a tin (which was enough to do at least 2 crankcases like mine) it's certainly cheaper than acid dipping. Of course you can't acid dip cases without completely pulling them apart first, but you can use NEVR-DULL anytime.

Check out the photos below and see if you think my efforts were worth it or not, and let me know what you think in the poll at the bottom of the page.
Click on the pictures for a larger version
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Before and After Polish Comparison
Complete Engine before polish
Complete Engine after polishing
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