I have a few big dents in the bottom of my aluminum boat that I want to fill. two years ago I filled one large one with Marinetex grey. It did very good and is still the exact same as the day I put it on. The only downfall is the price. And from what I have been reading it is over priced for what it is, and a much better product can be had for less money.  

I am researching other similar materials and was hoping someone had some experience with them. I emailed the following companies describing my situation and here is the product the recommended from their line. I listed in order of cost. 

Options are: 

pc11 epoxy

3m marine premium filler

West system Gflex epoxy

 

I am leaning towards te pc11 due to price, and seems to be a good product. Hoping someone has used it in a similar situation before. 

 

By the way not really interested in any other method of removing the dents, can't get to them from the inside to pound out, don't want to heat the metal up, and not going to spend the money to either weld studs to pull, or epoxy and pull the dent out.

 

I have used the G flex epoxy and I recommend it highly.  It bonds and shapes and flows into cracks/rivets very well.  Depending on the size of your dent, it could get expensive.  It must be painted over to protect it from the sun.  I don't have any experience with the others, I did use what is called short hair reinforced filler (bondo) above the water line on things like the corner caps on the top rear, and the sheeting on the bow, and that is holding up great so far as well.