What material should I use to repair hull? Photos inside

Hi everyone! I´m currently getting my H18 ready for summer and want to fix some small dents and parts where the gelcoat is thin and fiber is just visible....
I have the bottom of my hulls painted with black antifouling paint, I have sanded the antifouling paint off.
Should I use resin? or white epoxi paste?or any other material? to fill these minor imperfections?
what would you recomend? and how do I apply it
Also the daggerboard trunk/hull connection seems to have some paste that has cracked off in some places,in the last photo you can just about see what I mean. I was going to sand in there with my dremel...and then apply some material? what should I use? how should I apply it? It looks very difficult to work in there?

You want to stick with polyester material. That is what your boat is made of. That is, polyester resin or body filler. Body filler is not very structural so only use it where it is a cosmetic fix. If you need a structural fix be sure to include fiberglass cloth or matte to the repair.

I think that the bottom picture is the inside of the daggerboard well. You can wet out some fiberglass cloth, maybe 2 layers of 6oz, and apply it to a sanded surface using a long dowel that you can hold and roll from top and bottom of the well. The trick will be sanding to etch and getting the glass onto that area. You might try rolling the wetted fiber around the dowel put over the repair and unroll the dowel to apply.

Gel coat is very hard to get right if you are not familiar with it. Especially spraying or brushing on the outside (not in mold) to get it fair. I would highly recommend using a Linear Polyurathane paint. It can be brushed on and will come out pretty darn smooth. At first it will look like you are going to have brushstrokes when it dries but somehow they magically disappear. Try it out on something, big enough to see, first if you are at all skeptical. I am familiar with the 2 part but someone recently told me they had fine results with the one part. Do not breath it!

Later,
Dan