In the early 1980's, the Soviets and the Poles were in the process of replacing the Su-7B (with the Su-17/Su-20), but it wouldn't be fully retired until 1990. The vast majority of Polish Su-7B's seem to have been in a plain aluminum finish:
Only a few were painted overall very light gray (as in the top photo), and since it was unusual, that's what I've chosen:
The Su-7A was an interceptor and entered service in 1958, but was not wholly successful and just under 200 were built. It was retired in 1965, having been replaced by the MiG-21. The Su-7B was the main Soviet ground attack aircraft of the 1960's. It entered service in 1961 and was also never seen as an entirely satisfactory aircraft, as the operational range was fairly short at just 1025 miles (980 km) and it had a very limited payload of only 4400 lbs (2000 kg). Despite this, 1,650 were produced. The aircraft's shortcomings drove the development of the Su-17.
More from me during or after the long holiday weekend!