Have you tried:

string linkUrl = string.Empty;
		PermanentLinkMapStore.TryToMapped(CurrentBlock.FeatureImage.Uri.ToString(), out linkUrl);

If you had used MVC you could have used @Url.ContentUrl(Model.CurrentPage.FeatureImage) but I do not know it that is possible in webform.

What you can do is to wrap that in a function that use this code:

var urlHelper = ServiceLocator.Current.GetInstance<UrlHelper>();
var friendlyUrl = urlHelper.ContentUrl([PASSED LINK TO FUNCTION]);

It is more explained here:

http://world.episerver.com/Forum/Developer-forum/-EPiServer-75-CMS/Thread-Container/2014/4/Get-friendly-Url-from-Url-property/

PermanentLinkMapStore.TryToMapped(CurrentBlock.FeatureImage.Uri.ToString(), out linkUrl); returns something like /link/e5d12600-ec7d-4592-a124-f08a525caa94.aspx?id=1111&epslanguage=en

There is no method ContentUrl on UrlHelper class.Also, None of other methods mentioned in other thread worked :(. 

All i am doing is on model

[UIHint(UIHint.Image)]

public virtual Url UrlToImage{get;set;}

and in the aspx page

<%=this.CurrentPage.UrlToImage %>

but it shows something like /link/e5d12600-ec7d-4592-a124-f08a525caa94.aspx?id=1111&epslanguage=en

Property control renders it correctly by showing something /global/a.jpg.

but i dont want (can't) use property control.

Any other suggestions guys?

The following code sample should give you friendly url. (there is no error checking in this code)

 var urlHelper = ServiceLocator.Current.GetInstance<UrlResolver>();
var friendlyUrlBuilder = new UrlBuilder(this.CurrentPage.NewLogoUrl.ToString());
ContentReference contentReference = PermanentLinkUtility.GetContentReference(friendlyUrlBuilder);
 string url = urlHelper.GetUrl(contentReference);

return url;

I am unsure if this is the best way of doing it but it seems to be working fine.