Is there some type of paint/stain/or sealerI can use on my asbostes roof shingles to enhance the appearance and preserve my roof? I have powerwashed my roof and it looks good right now .I would really like to preserve this roof because replacing it would be very expensive what with sheathing and asbestos disposal.If anyone out there can help me or has any info on this I would really appreciate it. Thankyou very much,