Does Evo Grey PMB-5969 require a clear coat and if so, which do you recommend?

A clear coat can be recommended depending on application. While Evo Grey PMB-5699 does not require a clear coat if applying to a set of wheels are a railing outside in weather, then a clear coat would be beneficial. Being that Evo Grey PMB-5969 is a satin finish, selecting Fog Clear PPB-4761 would provide the same gloss level finish. Like any other finish, application use should determine if additional color protection is needed.

I am looking to do my wheels in evo gray PMB-5969, however I have the issue of the center cap. I see that Harley's charcoal satin is similar but I cannot find that in a touch up paint. Any suggestions as to how to find a paint to match?

Unfortunately we do not make liquid paints to match our powder colors...too many colors. However, there are places that may help you find what you need. www.customcolormatch.com is one possibility. I believe you will have to supply a color sample. If you are only looking for small touch-up amounts you would be surprised at how many color options finger nail polish is offered in. Places like Macys or Ulta may prove to be a good source for touch-up colors. Automotive paint supply houses may be able to match something as well.