In the first pic...I have three areas in question. First one is approx. 4inches across and is right above the left hole. the other spot is about 2 inches in dia. and at 9:00. The last area is at 11:00. What I've done, stripped paint, blades and sanding (no paint stripper). Blocked body and used Ever Coat Vette Panel Adheisive/Filler and blocke again. Shot Dupont high build 4 coats and blocked. These areas were not there after the first spray and block. I then shot three more coats of high build, and still no sign of what you see in the pic. I then repaired some cracking in the nose, (not in this area) but did receive the last two coats of high build where I repaired the cracking. Now... these spots showed up after I blocked the for the final time.

Anyone have any ideas what is causing this? Do you think these areas will effect my B/C C/C???


The next pic... is where I filled the holes from the Luggage rack. They did not show up untill today after the final block... What I did... same as above except I put four layers of fiber glass matt under the holes then filled the holes with fiber glass resin. I then finished off the holes with the Vette panel filler, then shot the primer as above.

I'm thinking, I need to dig out the resine and replace with cat hair. I haven't explored the cracking yet, but, all six holes are the same. Sure could use some help. Sure glad I haven't shot the Base/C C/C yet.


Last question... I not use a sealer between Dupont high build and paint stripped body. It was my understanding that I did not need to do this as I removed all old paint. Was this correct? Needless to say, I have these panels just about perfect...sure would hate to remove the high build so as to shoot a sealer... Thanks heaps Don

 

for the holes you need to ring them out and bevel the edges on top, fill with fiber mat (cat hair?) then smooth off and fill on top.
On the nose it looks like you just got a little froggy with the sanding block, shoot them over and sand Lightly

 

Filler shrunk..agree with bevel..that should do the trick..

 

Rich, Sixfooter...thanks for the input!!! Yea, I'll ring out the holes and apply the cat hair. Just wondering why this happened as it does not look like the Vette Panel shrunk... for some reason it looks like my primer did not bite on the panel adhesive, ummmm.

Sixfooter...what do you mean by froggy with the sanding block???

Also, did you see my final question at the bottom of the thread? Thanks heaps!!!

 

All repairs or any type need time to cure. All fillers, even those with glass, will shrink some over time. All you can do is give it as much curing time as you can. If using a urethane primer/surfacer, you shouldn't need a sealer. Yes, you should have beveled all holes, or they will crack.

 

If it was my car i would go one step further on the holes and grind the outside bevel them back a good inch on all sides and use mat and resin on the outside, then grind and fill with the vette bond repair filler,Making sure to use a [SMC] sheet molded compound compatible resin.Although i am not sure when GM started using SMC panels it never hurts to be sure.You might also consider color sanding the primer with a paint stick wrapped in 400 grit wet or dry paper wet sanding of course. Good luck, Chico

 

Bevel the tops of the holes and fill with either resin and mat or use long strand Tiger Hair. I filled similar holes on mine using Tiger hair and there was no problem. It looks like the filler did not adhere to the fiberglass and also shrunk. When you bevel the edge, it stops this from happening. Body filler is not strong enough to fill these that is why you should use some type of fiberglass.

 

Hey Muddy, by Froggy I meant that it looks like you just sanded thru the primer or whatever you have on there. It is acceptable to have a very thin coat on the high spots there though, as long as they are covered. The filler you used in the holes didn't have enough surface to hang on to in the holes, essentially just the inside edge of the hole the thickness of the panel. Grinding a bevel on both sides and filling with cat hair/resin is the way to go there, just like a panel crack.
As for your last question, I don't know the answer. I would read thru a couple of the papers on here for paint/prep.

 

Thanks Big G (Gary)...& members...I'll explore those luggage rack holes today. As you said, I need to bevel the holes which I did not. I've had a few other places on the body where the primer cracked. Uncovering those areas I found no actual crack...just where the primer did not bite to the glass, ummmmm. That is why I was asking about the sealer, (between the glass and first coat of primer. I'll explore the holes and post results...thanks!

Sixfooter...thanks for the froggy description...but, I don't think that is what it is...I know it probably pretty hard to see it and even more difficult in describing... This puter I'm using right now (G/F's) I can't even see it. But, all three areas have several wavey contour edges... looks like some kind of chemical reaction happening. I don't know what a fish eye looks like or rather the later even exist within primer. All I do know is... before I shot primer, I always used prep all (Duponts plastic cleaner). I'm sure on this body, I've sanded through multil layers of primer and did not get this froggy look...ummmmm. Thanks again! Muddy

 

You might want to blast those areas with a heat gun any traped solvent or mouisture will pop. go easy with the heat gun, also it is very important that the proper grit is being used on each sucessive coat,and if you are dry sanding or wet sanding .... It's nice to find these problems now. (check the data sheets) for the proper methods . best of luck