ChromaBase/Clear. with flattener. Have used Nason clear as well, cheaper and can not tell the difference. Primer, well depends on the part. DuPont Fill-n-sand 131S, Nason Ful-Fil are about the same. DuPont 3240S high build urethane high build primer-nason has a similar product. FYI Nason is owned by DuPont just a step down-in price anyway.
Standox spot putty is the bomb!
