Why do mint-looking LPs sometimes play poorly?


I've purchased some older Japanese vinyl (e.g., pro-use LPs) and some older half-speed vinyl pressings (e.g., cbs mastersound) and on a few occasions, although they have *looked* perfect under very bright light, they play with quite a bit of surface noise. The LPs are not warped, and the surface noise persists after a thorough cleaning. Any insights or recommendations? Thanks!
schuyler1976
I have had some success recleaning again than using microfiber towel and aquafina water pressing down firmly and spinning many times,then play and reclean with aquafina again.That cleaned up some noisy lp's I gave up on.I manually clean with the towel and water.Sometimes it works.
I have always cleaned my vinyl before it is played. I am now recleaning all my vinyl because the vinyl is much quieter with a final rinse with Aquafina water.
Macdadtexas when steaming i ve noticed if you get a record that has a lot of dust and debris on it before you use a brush on the LP first pass the steamer lightly and then vac this will get most of the debris off the surface before you start brushing doing this results in a better playing record.

Using a double rinse is key to a great playing vinyl record. Sorry to get off the subject.
Mike