How To Grade My Lincolns?

The 1937 looks to have just a little rub on the high areas of the design - the jawline, the cheek , and the high points on his jacket. On the reverse the wheat stalks look a little flat at the center. It does have quite a bit of the original luster , but not enough to be graded full "red" . I would give the 1937 a grade of AU-55 Red Brown. The pictures are a little dark, and I could be mistaking the dark areas for wear.
The 1958-D Has lots of luster and could grade full red. It does not look like any of the high points have any wear, so it appears to be uncirculated. A few spots (notably on his head ) and some hits here and there. The obverse looks pretty clean as far as contact marks, and the reverse has just a few smaller marks. I really like the surfaces on the obverse and I think it would keep the grade up even with the slightly worse reverse. I would grade this an MS-64 Red. The mark in front of Lincolns bowtie looks to me like a clash mark , rather than a hit, so it should not go against the grading of the coin. Hope this helped a little. A copy of the official ANA grading standards can be really helpful, a good investment for any collector.

1937 may be EF-AU
1958 MS-63

1937 MS60
1958 MS62