Graphics2D - Ajuda com Scale em um component

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.KeyStroke;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author lcl
 */
public class TesteComponentZoom extends JPanel
{
    double ratio = 3;
    JButton b;

    public static void main( String args[] ) throws Exception
    {
        TesteComponentZoom t = new TesteComponentZoom();

        JFrame f = new JFrame();
        f.add( t );
        f.setSize( 800, 600 );
        f.setVisible( true );
    }

    public TesteComponentZoom() throws Exception
    {
        initComponents();

        b = new JButton( "Teste" )
        {
            public void paintComponent( Graphics g )
            {
                Graphics2D g2d = (Graphics2D)g;
                g2d.setClip( null );
                g2d.scale( ratio, ratio);
                
                super.paintComponent( g2d );
            }
        };

        add( b );
    }

    public void initComponents()
    {
        setBackground( Color.lightGray );

        InputMap imap = getInputMap( JComponent.WHEN_IN_FOCUSED_WINDOW );
        imap.put( KeyStroke.getKeyStroke( KeyEvent.VK_ADD, InputEvent.CTRL_MASK ), "PresenterPane.keyPress" );
        imap.put( KeyStroke.getKeyStroke( KeyEvent.VK_SUBTRACT, InputEvent.CTRL_MASK ), "PresenterPane.keyPress" );
        ActionMap amap = getActionMap();

        Action pressedAction = new AbstractAction()
        {

            public void actionPerformed( ActionEvent e )
            {
                ratio += ((e.getActionCommand().equals( "+" ) ? 0.5 : -0.5));
                System.out.println( "Pressed " + ratio );
                repaint();
            }
        };

        amap.put( "PresenterPane.keyPress", pressedAction );
    }
}