Any proof or are we supposed to just trust some random guy on the net?
Porsche and Audi run NGK stock in all of their high end vehicles so they will do just fine for your Civic.
You are not mistaken that there is nothing wrong with NGK, however Sumitomos have just proven to be the best thing out there period.
Here you go, the green line is the OEM Sumitomo:
http://www.vtec.net/articles/view-article?article_id=8680
vtec.net Article said:
The actual power outputs are not crucial and have been removed from the charts to make the comparison more straightforward. The most important point from the charts is that the stock spark-plug cables produced the highest and most consistent power curve. The most significant factor is the smoothness of the stock cable's power curve. Both the 'generic' 8mm silicon cable and the NGK were seen to be misfiring as evidenced by their jagged curves after 5000rpm and especially in the VTEC rpm band. Both 8mm silicon and NGK delivered about the same max power which is about 1ps lower than that produced by the stock cables. Note that the stock cables, although 8 years old, consistently produced better power all across the dynoed rpm band, 3000rpm till the 8000rpm red-line. Especially surprising is the fact that the stock cables did not misfire, thus proving that they produce more consistent sparks even compared to the brand new and supposedly superior NGK blue cables !
.
Also, company history for Sumitomo:
http://www.sei.co.jp/sei_info_e/history/roots.html
company historic milestones:
http://www.sei.co.jp/sei_info_e/history/
proof of their involvement in the auto industry:
http://www.sei.co.jp/ewp/E/tenzikai_zyouho..._zyouhou_f.html
example of one of their spiral shielded wire products:
http://www.sei.co.jp/ewp/SEI_WEB/category/...frame_3_06.html
in conclusion: SUMITOMO ELECTRIC is 100000000000 times > NGK, nology, magnecor, etc...even > honda motor co.
@OP: Regarding the grill, find a nice local auto body shop to paint the trim. Remove the screws that hold the trim piece and just ask them to paint it with the proper paint code for taffeta. (Taffeta White NH-578)
You'll be a lot happier with a professional job. Buying the automotive paint and clear coat would run you around $60, that's what it cost me a few years ago. A shop should only charge you ~$50-80 and they'll probably do a lot better job than you will.