Deactivate Button in Jtable

I took some time doing a table in Java. The issue is that I need help, since I need to "disable" a button (which is integrated in the table) if in the comment COLUMN corresponds to "Rejection".

I hope you can help me. I break the code.

public void llamarMuestra() throws SQLException {
 //   tblDatos.setDefaultRenderer (Object.class, new MiRender()); 
    tblDatos.setDefaultRenderer(Object.class, new Render());   //LLAMA CLASE RENDER QUE GENERA LOS BOTONES
    tblDatos.setAutoResizeMode(JTable.WIDTH);

    setVisible(true);
    JButton btn1 = new JButton("Modificar");
    btn1.setName("modificar");
    JButton btn2 = new JButton("Eliminar");
    btn2.setName("eliminar");
    DefaultTableModel modelo = new DefaultTableModel();
    JTable tabla = new JTable(modelo);

    trsfiltro = new TableRowSorter(modelo);
    tblDatos.setRowSorter(trsfiltro);
     String query = ("SELECT m.idMuestras, m.nregistro, c.nombrecliente, m.matriz, m.fechaingresolaboratorio, m.laboratorioejecutante, m.estado, m.observaciones,m.comentario "
            + "FROM muestras m "
            + "INNER JOIN clientes c ON m.fk_idcliente = c.idClientes WHERE m.laboratorioejecutante LIKE 'LADIOX' ");
    PreparedStatement pst = cn.prepareStatement(query);
    ResultSet ResultSet = pst.executeQuery();
    modelo.setColumnIdentifiers(new Object[]{"ID Muestras", "Numero Registro", "Cliente", "Matriz", "Analisis", "Ingreso Laboratorio", "Laboratorio Ejecutante", "Estado", "Comentario Rechazo", "Modificar", "Eliminar"});  //creo el nombre de la columna
        try {
            while (ResultSet.next()) {
                int a = ResultSet.getInt("m.idMuestras");
                modelo.addRow(new Object[]{ResultSet.getInt("m.idMuestras"), ResultSet.getInt("m.nregistro"), ResultSet.getString("c.nombrecliente"),
                    ResultSet.getString("m.matriz"), Listaanalisis(a), ResultSet.getDate("m.fechaingresolaboratorio"),
                    ResultSet.getString("m.laboratorioejecutante"), ResultSet.getString("m.estado"), ResultSet.getString("m.comentario"), btn1, btn2});
                btn2.repaint();
            }
            tblDatos.setModel(modelo);
            tblDatos.getColumnModel().getColumn(0).setMaxWidth(0);
            tblDatos.getColumnModel().getColumn(0).setMinWidth(0);
            tblDatos.getColumnModel().getColumn(0).setPreferredWidth(0);
            modelo.fireTableDataChanged();
        } catch (SQLException e) {
            Logger.getLogger(TableroMuestraLADIOX.class.getName()).log(Level.SEVERE, null, e);
            System.out.println("error con tabla");
        }
    }

WITH THE CODE GET UP THE TABLE AND CHARGE THE DATA AND NOW I SHARE THE RENDER FOR THE CREATION OF THE BUTTON WITHIN THE TABLE

/*
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 * and open the template in the editor.
 */
package Modelo;

import java.awt.Color;
import java.awt.Component;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableCellRenderer;

public class Render extends DefaultTableCellRenderer {

    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {


        // CREA BOTON DENTRO DE TABLA
        if (value instanceof JButton) {
            JButton btn = (JButton) value;
            if (isSelected) {
                btn.setForeground(table.getSelectionForeground());
                btn.setBackground(table.getSelectionBackground());
            } else {
                btn.setForeground(table.getForeground());
                btn.setBackground(UIManager.getColor("Button.background"));
            }
            return btn;
        }
        if (value instanceof JCheckBox) {
            JCheckBox ch = (JCheckBox) value;
            return ch;
        }


        return super.getTableCellRendererComponent(table, value, isSelected,
                hasFocus, row, column); //To change body of generated methods, choose Tools | Templates.
    }
//        return null;


    }