在Wordpress中按ID获取自定义帖子类型

I'm basically looking at somehow creating a loop so I can show the content of a single custom post type based on it's ID.

So, I want to get the content from the custom post type with an ID of 3788.

There is a function in there to get the featured image URL too.

For example, here's my code at the moment:

<?php $args = array( 'post_type' => 'about', 'posts_per_page' => 1 ); ?>

<?php $loop = new WP_Query( $args ); ?>
<?php while ( $loop->have_posts() ) : $loop->the_post(); ?>

<?php global $post; ?>
<?php
$src = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), array( 5600,1000 ), false, '' ); ?>  
<div class="section" style="background: url(<?php echo $src[0]; ?>) no-repeat center center fixed; -webkit-background-size: cover; -moz-background-size: cover; -o-background-size: cover; background-size: cover; z-index:-1;">

<?php the_content () ?>

<?php endwhile; ?>

<?php 
$ID = 3788;
$args = array('p' => $ID, 'post_type' => 'about');
$loop = new WP_Query($args);
?>
<?php while ( $loop->have_posts() ) : $loop->the_post(); ?>
    <?php global $post; ?>
    <?php
    $src = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), array( 5600,1000 ),  false, '' ); ?>  
    <div class="section" style="background: url(<?php echo $src[0]; ?>) no-repeat center     center fixed; -webkit-background-size: cover; -moz-background-size: cover; -o-background-size: cover; background-size: cover; z-index:-1;">
    <?php the_content () ?>
<?php endwhile; ?>