'76 22 Osprey re-build

[Que Pasa]

All the grey is bondo

[Que Pasa]

I need some help guys, I cant figure out what is going here. If you look at this picture you are looking at two sheets of clean glass. The yellowish one on the right is the hull side. The grayish one on the left is the inner transom skin ground and clean. The bright grey in between them is bondo. I cant figure out why. Has anyone else run into this? How do proceed now, can I glass to the transom surface with the bondo under it?

[RickK]

The grey, as said before is probably bonding putty.  It is polyester based just like bondo and it looks and sands like bondo.  They use it to bond the floor to the stringers and I guess they used it stick the transom wood to the glass.
Most mix resin with cabosil and whip it up into a smooth thickened almost "putty" and lay fillets in all corners to help the glass transition the edges.  They may have just slapped a bunch of bonding putty in the corners and set the transom in it.
I would say you need to get as much off as possible.  If you're worried about right in the corner, I wouldn't, you'll be laying a fillet in them and then glassing over that onto the bare glass you have now.  Get as much off the bare glass as you can.
Are you using epoxy or poly on your rebuild?

[Que Pasa]

Rick gonna be using epoxy on the transom and below the floor and poly above. The grey mat you see in the picture spans the entire inner skin of the transom. What I'm asking is can I glass straight to it?

[dirtwheelsfl]

Yea, better get to clean glass.     If theres some little depressions in the clean glass with it in there I wouldn't worry too much though, no need to dig em all out...

[RickK]

Like Chris said, what I see in the pics is residual bonding stuff in the "pores" of the glass.  I think you'll be fine.
Epoxy has some tenacious bonding power, like 200x better than poly but you want it to bond to as much glass as possible.
How thin is the outer skin? What is your layup schedule?  A few layers of 1708 on the inside of the transom and onto the waxed/pva'd melamine to extend it up to the the new cap level? For tying it into the hull, maybe 3 with a 4, 8 and 12" overlap onto the bottom and sides??

[Que Pasa]

I can't believe all the bondo. There is a layer of bondo under that mat that you see in the picture. Also some voids under under the mat holding water. Gonna have to ground them out and fill.

Yes, Rick that was going to be my lay up schedule, I did all this work up till now so I'm not going to leave any soft spots. I'll grind out and fill. This one is shaping up to be a nightmere.

[RickK]

I updated my post while you were typing yours - sorry.

[Que Pasa]

Has anyone else run into this layer of bondo?

[northfork]

I'm in the same stage as you and do not have the bondo. After I removed all the wood and ground down to glass it was all clean glass. Did you remove your deck yet. I have a '77 and would like to what you have for stingers. If you look at my pictures you can see where I'm at. I picked up cosa for the transom and getting ready to start glassing.

[Que Pasa]

Hey I'm no master re-builder or anything, but I'm pretty sure this is no good and has to go. Still trying to figure out what they did back here.

[Que Pasa]

Northfork, I haven't cut my floor out and wasn't going to until my transom was completed. I wanted to try and keep the boat somewhat square. But from the looks of your stringers they appear to be the same, at least they are in the stern where I've cut my floor to.

[northfork]

Could that be a thin layer of mat that was in the face of the plywood core and the glass outer skin. That could be why you are getting bonding agent under the thin layer of glass.

[CLM65]

Hard to tell what is going on there, but sure looks like you have a partially delaminated outer layer of glass.  I agree you'll need to grind that back to solid glass before building it back up.

[Que Pasa]

Well it's official, I'm in bondo hell. Looks like a previous transom repair 1/8 inch of bondo topped with a layer of mat, factory or handyman?. Past the 10 hour mark of grinding. What to do, junk yard or another 10 hours of grinding just on the transom.



Has anyone checked on grinding this much bondo, do you think I would need an air pak or ok with just a respirator.