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Hi Scott, The quickest fix is to obtain non-pitted replacement parts if possible. Seriously, the pits really are the pits. There is no easy, quick fix and no "new" trick. If you search this forum on "pits" you will have about 200 posts to read through and gather information on opinions/methods. If you have already done that, there is nothing really new to add. However, briefly, here's my method, assuming you have some serious pitting to contend with: 1. Blast to clean, bright metal, including bottom of all pits.
2. Prime with a 2-part epoxy primer (ex. PPG OMNI MP-170).
3. Fill with a 2-part polyester finishing putty (ex. 3M Flowable Finishing Putty) applied within the time window of the epoxy.
4. Sand to even surface (ex. 80, 180 grits)
5. Re-apply 2-part epoxy primer.
6. Apply surfacer (your choice, 2K preferable if you have fresh air respirator - 3 or 4 coats) within the epoxy time window.
7. Sand with 220, then 400 grit.
8. Repeat 6 and 7 as necessary to obtain completely smooth, defect free surface.
9. Clean w/surface cleaner (ex. PPG DX330).
10. Tack off with dedicated tack rag.
11. Topcoat (your choice - preferably from the same manufacturer and recommended for use with the surfacer used in 6).  Rod
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