Posted by Adam [173.245.48.177] on Thursday, November 10, 2016 at 14:45:44 :
In Reply to: Re: Going to paint (advice needed) posted by Kevin in Ohio [172.68.59.157] on Thursday, November 10, 2016 at 14:26:28 :
I will concede the point. Although a quick search shows you can get adhesion problems with finer than 600. Also, 400 wet in my experience does not show scratches. although there are two different grit rating systems, so it is important to know which you are using.
http://www.mibnet.se/home-improvement/sandpaper-grit-size-comparison-between-european-and-us-standards.html