Help.. Fiberglass, Epoxy, Filler - Non Auto Project

[sc paint]

Good evening.

Long time lurker on the forum with just a few posts (questions). I have something I thought someone here might be able to make a few comments on for me.

I am painting a fiberglass shower pan for my brother in law from a vintage trailer. He repaired the pan with fiberglass but it's not perfectly flat on the inside bottom where you stand and is therefore not going to look very good unless I correct that. I have a couple options. I can just prime with SPI epoxy primer and then use body filler to flatten out the surface then prime, base, clear... or I can lay in a thick flow layer of 2 part West epoxy which I have on hand in the garage to help a little. So my question is this for you fiberglass types. Can I put the epoxy over the fiberglass? Any issues? Can I put the epoxy primer over the 2 part epoxy? No mention in the tech manual of this -just fiberglass.

If the pan is only going to get a couple showers use a year should I even bother with the additional epoxy or should I just go with a little filler. I think I'll need to use some filler in the end - just a matter of whether I am using 1/16" inch in a few spots or something less.

Will be base coat clear coat finished using SPI Universal

Any input would be appreciated.

Thanks - Jake

 

[Bob Hollinshead]

From what I hear the west systems epoxy is good stuff and I know a few user's here use it on fiberglass and use SPI epoxy over it, but there would be nothing wrong with using traditional polyester resin and fiberglass. I wouldn't use regular filler on it if it's going to flex much.

 

[sc paint]

Thanks Bob for that response. I'll flow something in then (fiberglass or epoxy) tonight. Appreciate you weighing in for me.

Jake

- - - Updated - - -

One more quick question if you don't mind.

How long do I need to let polyester resin cure before putting the epoxy primer over it?

Thanks - Jake

 

[Bob Hollinshead]

I would let it cure overnight if you can and make sure to sand it good before epoxy primer

 

[sc paint]

Thanks Bob that's great. I layer in the light coat tonight and it looks 100 percent better. I will let it cure for 12 hours at least and then move on. Appreciate the help.