Primer on Fiberglass Fix?

[PaulvS]

Originally Posted by mfleming

I appreciate everyones input.

The reason for applying the epoxy primer is not for final paint...it's sole function is to protect the fiberglass from oil and dirt until it makes it to the painters...they'll sand it off and do whatever it takes to make it pretty.

My question was/is, do you think what's on there will protect it from oil/dirt?

And since my original post, I sprayed another coat of primer...

Do I think what's on there will protect from oil/dirt? Nope, because there are visible voids that can trap oil/dirt.

How long will you be flying it before your paint slot, i.e. not at all; phase 1; 12 months? That may influence how much protection you need.

[mfleming]

Originally Posted by Bandera

No reason to back to bare unless the the surface was never sanded.

The surface was completely sand...too much so in some areas.

Originally Posted by PaulvS

Do I think what's on there will protect from oil/dirt? Nope, because there are visible voids that can trap oil/dirt.

How long will you be flying it before your paint slot, i.e. not at all; phase 1; 12 months? That may influence how much protection you need.

The hope is that I can get it into the paint shop shortly after it flies...

Since the photos, I added a second coat...

[wirejock]

Finished my popcorn. Making a new batch!
Like the man said, just trying to protect it till the paint shop.
Epoxy fiberglass needs to be protected from UV.
Enjoying my popcorn.

[DanH]

Originally Posted by Bandera

No reason to back to bare unless the the surface was never sanded.

The advice was to return to bare glass and shell it with epoxy, the result being a fully sealed surface...the goal here. Subsequent primer would largely be for UV protection until it can be test flown and taken to the paint shop, which seems to be the plan.

I don't think Mike is going to do it, given he is spraying more primer, so what process do you propose, and why?

[mfleming]

Originally Posted by DanH

The advice was to return to bare glass and shell it with epoxy, the result being a fully sealed surface...the goal here. Subsequent primer would largely be for UV protection until it can be test flown and taken to the paint shop, which seems to be the plan.

I don't think Mike is going to do it, given he is spraying more primer, so what process do you propose, and why?

I sprayed a second coat of primer because I’m losing my window to spray outside and I wanted to do something quick.

For what it’s worth, I agree that sanding down to glass and shell with epoxy is the best option. It’s what I did on the windshield fairing and canopy skirt.

In hindsight, I should have taken the time to do that before priming. I thought it wasn’t necessary because the paint shop was going to do their magic on the cowling and all I had to do was protect it from oil and dirt.

[mfleming]

UPDATE: I sent current photos of the cowl to the paint shop and they were comfortable that the cowling is protected until they get their hands on it.