Bedliner inside body, why???

[elfrey]

Hi all,

what is the reasoning behind coating the inside of the body with bedliner?

Thanks in advance.

[GoDadGo]

The raw fiberglass really should be sealed if possible.
I used Raptor Bed Liner which can be rolled or sprayed on.

https://youtu.be/FVMCA4_UZHU

For the record, I should have rolled mine on instead of spraying it because I got overspray all over the place.
If I build another car, I'll use Raptor on the aluminum panels instead of painting, sealing, powder coating or anodizing them.

Hope This Helps & Good Luck!

[gbranham]

Was a single 4 Liter kit enough to do the full underside of the body? And yes, Kleiner, I'll leave an inch uncoated at all edges. ;)

[Jeff Kleiner]

Was a single 4 Liter kit enough to do the full underside of the body? And yes, Kleiner, I'll leave an inch uncoated at all edges. ;)

Yes, when I spray it that is enough to do the entire underside plus double up in the areas that are most prone to getting rocks and debris thrown from the tires.

Jeff

[GoDadGo]

Was a single 4 Liter kit enough to do the full underside of the body? And yes, Kleiner, I'll leave an inch uncoated at all edges. ;)

Yes, I ordered the 4 Quart Kit because it came with a Schutz Spray Gun and used 3 of the 4 quarts to cover the body.
I then installed a layer KILMAT on the tops of the inner fenders and rolled the last quart over the KILMAT to seal them in.
I did this in an attempt to reduce the chance of having rocks damage (Creating Gel Coat Stars In The Paint) when stones get thrown by the tires.

Hope These O.C.D. Tips Help!

[elfrey]

Thanks for this information, I wasn’t aware.

[PMD24]

I had the same question and researched it extensively. I couldn't find any information indicating that fiberglass (boats, cars, snowmobiles, etc needs to be sealed. The exception would be structural elements that contain a core material that is sensitive to moisture (ie. wood). As a precaution, these areas should be sealed.

Wheel well areas should be coated with a product (such as Raptor) to help prevent paint starring from stone impacts.

All of this is consistent with what was taught in the Build School.

Pat

[Dgc333]

I did the entire body of my 33 Speedstar with Raptor bed liner. Primarily to provide a more finished appearance to the inside of the roof and the inside of the side panels. I did not do the inside of the doors. Since the entire body needed masking didn't see a reason not to do the parts of the body that aren't seen when built

Never heard of needing to seal fiberglass but it makes sense to prevent any moisture from getting into a void or pin hole and freezing causing a crack in the paint/gel coat.

[JohnnyB]

I’m curious if anyone has ever actually had a paint star cause by a rock hit in the wheel well. I can’t argue with the logic of coating the underside of the fender. It’s cheap insurance and Kleiner recommends it which is good enough for me. That being said, in all my years of following these forums I don’t think I’ve ever seen a picture of paint damage from a stone hit from the underside of a fiberglass body.
Anyone actually had this problem on a Factory Five?

[GoDadGo]

Never heard of needing to seal fiberglass but it makes sense to prevent any moisture from getting into a void or pin hole and freezing causing a crack in the paint/gel coat.

As a former boat builder, water getting access to unsealed glass will eventually booger it up over time.
Unless you submerge the body I doubt there would be any issue; however, sealing the raw fiberglass is a good practice.
The good news is Factory-5 uses Vinylester Resins which are far less absorbent than Polyester Resins.


NOTE: Most production pleasure boats are done in polyester because it is the least expensive.

[Jeff Kleiner]

I’m curious if anyone has ever actually had a paint star cause by a rock hit in the wheel well. I can’t argue with the logic of coating the underside of the fender. It’s cheap insurance and Kleiner recommends it which is good enough for me. That being said, in all my years of following these forums I don’t think I’ve ever seen a picture of paint damage from a stone hit from the underside of a fiberglass body.
Anyone actually had this problem on a Factory Five?

I've seen a couple.

Jeff

[MPTech]

I’m curious if anyone has ever actually had a paint star cause by a rock hit in the wheel well.

A fellow member of our club had an earlier roadster (MK2 / MK3). Within a couple months of having it painted, a rock came straight up on one of the front fenders and left a half-dollar sized star right on the peak of the fender. It was noticeable and only a repaint could repair it. I saw it first-hand and it hurt to look at it.

I made sure my body was bed-lined.

[cdurbin328]

Yes, I ordered the 4 Quart Kit because it came with a Schutz Spray Gun and used 3 of the 4 quarts to cover the body.
I then installed a layer KILMAT on the tops of the inner fenders and rolled the last quart over the KILMAT to seal them in.
I did this in an attempt to reduce the chance of having rocks damage (Creating Gel Coat Stars In The Paint) when stones get thrown by the tires.

Hope These O.C.D. Tips Help!



I did the same thing.
I too suffer from OCD... lol

[john42]

A fellow member of our club had an earlier roadster (MK2 / MK3). Within a couple months of having it painted, a rock came straight up on one of the front fenders and left a half-dollar sized star right on the peak of the fender. It was noticeable and only a repaint could repair it. I saw it first-hand and it hurt to look at it.

I made sure my body was bed-lined.

I was wondering how those stars came to be in my paint. On my Challenge car which isn't coated at all... I have several of these stars in my paint around the wheel wells.

[elfrey]

The raw fiberglass really should be sealed if possible.
I used Raptor Bed Liner which can be rolled or sprayed on.

https://youtu.be/FVMCA4_UZHU

For the record, I should have rolled mine on instead of spraying it because I got overspray all over the place.
If I build another car, I'll use Raptor on the aluminum panels instead of painting, sealing, powder coating or anodizing them.

Hope This Helps & Good Luck!
Thanks for sharing your video, I noticed you masked off the edges and the roll bar openings. Can I ask why?

[GoDadGo]

Thanks for sharing your video, I noticed you masked off the edges and the roll bar openings. Can I ask why?

I forgot to mask them off, along with the windshield openings, when the body was upright before we flipped it.

Once it was inverted I didn't want to stress the body another time because it seemed rather floppy when my son and I flipped it.
I painted them those and other areas with a brush after Baby Go Dad cleaned up my overspray screw up. (aka: Boo-Boo)
If I had to do it again I'd have roll the entire body but having the Schutz Gun kind of pushed me into spraying it.

[Jeff Kleiner]

I painted them those and other areas with a brush after Baby Go Dad cleaned up my overspray screw up. (aka: Boo-Boo)
If I had to do it again I'd have roll the entire body but having the Schutz Gun kind of pushed me into spraying it.

I wrap and mask the entire exterior surface. It takes a lot of time but I greatly prefer the coverage and finish that spraying it provides. In the end I'd bet that it takes an equal amount of time to roll/brush it on as it does to mask and spray.

Jeff

[elfrey]

I wrap and mask the entire exterior surface. It takes a lot of time but I greatly prefer the coverage and finish that spraying it provides. In the end I'd bet that it takes an equal amount of time to roll/brush it on as it does to mask and spray.

Jeff

So there’s no need to mask any of the underside, you’re only masking to keep the overspray off of the body exterior, correct? I saw the post from gbranham about leaving an inch around the edges uncoated and I was wondering why.

[Jeff Kleiner]

That’s if you’re undercoating prior to trimming and shaping the wheel openings, louver cutouts, etc. In my case I do undercoating after those are all done…in fact I don’t apply the Raptor until after paint.

Jeff

[Ejzajac]

How do you go about spraying Raptor on the underside?. Is the body still on your painting rack or do you flip over the body? Rotisserie?

Ed Z

[gbranham]

How do you go about spraying Raptor on the underside?. Is the body still on your painting rack or do you flip over the body? Rotisserie?

Ed Z

Flip it over and lay it on a tarp.

[Jeff Kleiner]

I hang ‘em.

https://thefactoryfiveforum.com/attachment.php?attachmentid=211712&d=1742587941


Jeff

211712

[DanQ]

I brushes/rolled all the inner surfaces of my '33 body, inside the doors, and especially the underside of the fenders and running boards with Herculiner. It provides sound deadening, looks nicer than fiberglass, and gives great protection from stones. Think how forceful a stone caught in the tires tread grooves becomes when it lets loose at 60 MPH.

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