Am I missing something? I'd like to have a READ ME item in a shop section, which only applies to that section (which I've asked for elsewhere here...). So I make an item that says READ ME, with section specific info... and of course I don't want to sell that item, so I uncheck SELL TO OTHERS, and check DISPLAY TO PUBLIC. Should work, no? No. This removed the item from the section, hides it completely. So I have to check both boxes... https://www.shapeways.com/shops/patmat?section=Sterling+42%2 7+Corvette&s=0 grumble...
If something is public but not for sale it won't show up in your store. For what you want to do you would need to have an actual model that could be bought as a product. Might I recommend a model made of text characters that reads "READ ME"? That way the product render would also say "READ ME" ------------------------- Ah, I see that's what you did. I think that's the only work-around! If you pre-angle the text to counteract the render angle it will be more legible (I think 30 degrees will do it). And upload it in color, maybe red, to make it stand out more!
Just for the fun of it I created a "read me" model in color. Anyone can download the .x3d file if they want to use it. https://www.shapeways.com/product/PKKV5RVNK/read-me