If its new paint you shouldnt need to clay it yet. Clay is to remove contaminants on the surface. At my shop I used Chemical Guys products. Their Butter Wax is a very pure carnuba that works great but wont fill and hide and imperfections which you shouldnt have recuse its a new paint job.

If you prefer a sealant Jet Seal 109 is excellent.

I also prefer to apply them with a Porter Cable D/A polisher and a blue foam pad instead of hand waxing. Its much faster and goes on more evenly.