Hello Pat,
sorry for the delay.
As for the detailing, I was thinking about things like thinning the covers of the engines so that they dont look too heavy:
Look at the edges of the opened covers and the air intakes - they need work. You could also add some wiring and plumbing to the engines in 1:48. And the ladder could use some use marks - the steps of the ladder, for example are more worn on their topside and relatively fresh on their underside, unless the ladder is completely new, of course.
Concrete is easy - if you mix some acrylic black paint with water, you can put such black wash on the concrete and then you get nice discolorations and dirt. Cracks can be pencilled in, too. Here's what I've done using only acrylic putty and black wash for concrete:
Posting pictures is easy when you alredy got them on the net. Just visit your page, select a picture and right-click it, choose "Copy image url" or something to this effect, depending on your browser. You want the URL of this image (http://...../....jpg). Then, editing a post, you've got this icon (insert/edit image) between "the chain" (insert/edit link) and "the movie"(insert/edit video). Click the icon and paste your image's URL, click OK and there you go.
I hope this helps, have a nice day
Paweł