I have had more than a few people write me via e-mail commenting on this blog. They all say they don't know how to publish a comment. It is a little intimidating the first time but it does get easier and even becomes fun! The way to publish a comment is to click on the little link that says "comment." This takes you to a page with a text box, and a list of comments already posted, if there are any. You type in the text box. You do not have to have a google account to post. You can be anonymous, or you can use existing accounts from a variety of IM accounts, etc. You must do the word verification text box or it will not go forward. You can preview your comment before posting. It is as easy as that.
The other comment I have had made is not feeling qualified to critique or judge art. I don't expect everyone to be comfortable with this, but if you have a reaction to a piece of art, say so. Art is very relative to the viewer. It will not appeal to all people. But something may jump out at you after you have passed over many. Posting photos of my plein aire work helps me to see what needs to be done, which is why I comment on it. A photo shows things that I do not see because I am too close to it. A photo strips that emotional tie away. Some need touching up, some don't. Some need a major overhaul!
It should be easy to comment on the before and after. Either you like one better than the other or you don't. I have been reworking quite a few old paintings so there will continue to be more of these posts.