How concerned should I be?

I have a 17ft (I believe Pelin) from around the 70's/80's with a 70hp Johnson on it that has never missed a beat and has full service history. It came to me form a family member about 5 years ago.
This boat has been my first and has mostly sentimental value for me, so while I realise what I'm doing is not financially sound, I'm hoping it will return me a solid boat to hand on to my Son. It's in the shed for Winter and a new coat of paint and generally a tidy up with new fittings and trailer work, new glass etc over the break.

Today when removing the various panels and windows etc to start on the mighty sanding project I came across what I'll call issues 4 & 6 (in the related images).

Issue 4 looks like something has hit a stringer internally and "chipped" it significantly. The chip was in the boat so I still have it. Should I be concerned and any advice about repairing/reinforcing it?

Issue 6 is more of a concern to me. This is a small wavy arena right on the port/stern where it joins the transom. It doesn't feel terribly soft but does look a little deformed. Given its location, I dont want to go "digging" around in it just in case i make a minor issue a big issue.

Can anyone offer any advice on these two problems before I go too much further? I'm hoping to just do a top side/inner paint job so was hoping to avoid touching the waterline aside of a couple of scuffs that need fixing.

Thanks
Brian

 

It looks like the chip is near the bow where the structural elements ate closing in on each other. I would simply glue the chip back into place, sand smooth then varnish.

Thete is definitely a paint blister. But is the is, or is there aint rot underneath? Slice blister open with knife nearly parallel to surface and insert a putty knife to pry/scrape as much paint away as possible. Perform the nose and icepick tests. If it smells rotten there's rot to be rid of. If icepick can be pushed in by hand, there's rot to be rid of. If tests indicate, scarf in new wood to replace any rot. Fair,prime and paint.

Don't be alarmed if lots pf paint peels up. Even primers need to be replaced every couple of decades

Hopefully it is just a paint blister no rot.

Have fun