Scuff the whole part and reclear-the blend line will dissappear. When doing bike parts-considering how small they usually are it really doesn't make sense to try and do a clear blend.
For a successful clear blend you need to have the right texture in the blend area for good adhesion and it needs to be super clean. Blending solvent should be used to melt your dry edge and the clear needs to cure well before buffing or that fragile clear edge on the blend will show. I have clear blends that are 17 years old that are fine so they can stand the test of time if done properly, but for small parts it is actually quicker to just scuff the part and clear the whole thing and be done.