re: 2 Part Epoxy Substitute

Yes, holes are not all the way through.  The heat gun is a good idea.  I found some stuff in a more manageable amount that is supposed to be very good about curing (72 hours) bubble free and very clear.  Not sure where it’s coming from but even with Prime not going to be here till Saturday.  I’ll let you know how it works out.   
Thanks again for your help.