Lotus Elan

Powder-coat or paint.

PostPost by: Ianashdown » Thu Dec 01, 2022 2:08 am

I’m planning and budgeting as best I can prior to the arrival of my project car and a question came to mind.

Once the chassis has had everything removed and been sandblasted, repaired as required and stiffened per 26R specs, the question then is powder-coat or paint?

I’ve seen the Eastwood chassis paint that is very close to the original red primer, I think it’s color is close enough and presumably does a sufficient job of protecting the chassis, particularly given that I live in Southern California.

On the other hand, my local powder-coat shop has a powder that gives also a very close color to the original primer and they can do it with a mat, semi-gloss or gloss finish. I’m thinking semi gloss. These guys have done several motorcycle frames and a couple of Formula Ford chassis for me and do an excellent job, carefully masking, plugging holes etc.

So how do we feel about one or the other process? Any pros and cons for either?

Thanks,

Ian
Ianashdown
Second Gear
Second Gear
 
Posts: 166
Joined: 14 Oct 2022
Location: Orange County, USA

PostPost by: rgh0 » Thu Dec 01, 2022 3:43 am

Personally i prefer to use an inorganic zinc primer and then top coat with a suitable top paint. I used an alkyd enamel. This has lasted for 40+ years on my Elan in Melbourne with a simillar climate to california.

I am not keen on powder coating as I have seen to many poor examples of it flaking off when rust gets under it.

cheers
Rohan
User avatar
rgh0
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 8474
Joined: 22 Sep 2003
Location: Melbourne, Australia

PostPost by: StressCraxx » Thu Dec 01, 2022 3:53 am

I completely understand Rohan's thoughts about powdercoating the chassis. I have also seen rust spread under powdercoat on Formula Ford chassis. I did some research on corrosion under powdercoating and found that most users simply powdercoated over bare steel. I contacted a coatings expert and he recommended a high zinc primer.

I had my chassis first primed with the high zinc primer and then coated with the semi-gloss red topcoat. It turned out really well. It hasn't hit the road yet, but I have confidence it will hold up well. Our climate is similar to Oceanside here in the Bay Area.
There is no cure for Lotus, only treatment.
User avatar
StressCraxx
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1320
Joined: 26 Sep 2003
Location: San Francisco Bay Area, California

PostPost by: Ianashdown » Thu Dec 01, 2022 4:29 am

Two interesting perspectives! I first used powder coat on a Triumph motorcycle frame in 1991 and it’s holding up beautifully. Since then all kinds of stands, carts and other shop equipment, 3 sets of wheels and, as I mentioned several motorcycle frames and two Formula Ford frames, all still look great! I had to strip the powder coat from one of the FF frames before re-coating it as the powder coat on there was so tough the sand blaster would hardly touch it! It was that tough!

I asked the guy who runs my local shop about the report of rust under the powder coat. He told me that this was a problem in the early days, but the newer powders don’t have the same issue. However he does say that if too much time passes between sand blasting and applying the powder coat then corrosion can have already started. He requires the parts be powder coated with 2 hours of blasting. Just enough time to mask up and hang the parts.

I have no preference either way, and the desire for originality will probably drive me to painting, but I did want to share my positive experiences with powder coat.

All inputs welcome!

Ian
Ianashdown
Second Gear
Second Gear
 
Posts: 166
Joined: 14 Oct 2022
Location: Orange County, USA

PostPost by: alanr » Thu Dec 01, 2022 9:04 am

I would not powder coat anything that is, or could be exposed to getting chipped in any way in the future by road rash or whatever. Once a chip occurs rust will start and travel unseen underneath the powdercoat. You also cannot paint properly over previously applied powdercoat , once it chips it all has to come off.
Powdercoat as far as I am concerned is best left for use on office furniture!

Alan.
Alan
'71 +2 S130/4
alanr
Fourth Gear
Fourth Gear
 
Posts: 713
Joined: 14 Sep 2018
Location: Derby. UK

PostPost by: elanfan1 » Thu Dec 01, 2022 10:26 am

Have you thought about having it zinc sprayed where they melt a zinc wire and spray the liquid zinc on. Galvanising without the hot dip process. Etch primer then paint with red oxide paint?
Steve

Silence is Guildern; Duct Tape is Silver
User avatar
elanfan1
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2545
Joined: 13 Jan 2004
Location: Cardiff in Welsh Wales

PostPost by: RichardHawkins » Thu Dec 01, 2022 3:35 pm

I am not convinced that paint or powder are necessarily superior to one another. I have seen rust creep under paint and powder. What I am convinced about is preparation. Blast cleaning does an excellent job of cleaning and producing a profile for the paint/powder to adhere to. Unfortunately most blast cleaners reuse the blast media, this means that whatever has just been removed from your job and previous jobs is hurled back onto, and contaminating, the surface being cleaned.

When I was working (chemical industry) the engineer responsible for relining vessels insisted on new blast media and 100% supervision by one of his own supervisors whilst blast cleaning was being carried out.

Hope this helps,

Richard Hawkins
RichardHawkins
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1119
Joined: 05 Jul 2008
Location: Lincolnshire U.K.

PostPost by: pharriso » Thu Dec 01, 2022 4:12 pm

Just to give you another option... Do a search here for POR-15...

Use gloves!! you have been warned :roll:
Phil Harrison
1972 Elan Sprint 0260K
User avatar
pharriso
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 3703
Joined: 15 Sep 2010
Location: Long Island NY, USA

PostPost by: baileyman » Thu Dec 01, 2022 4:22 pm

Before geting my TTR sub-frame, Gary Anderson said, Don't powdercoat it, because a chip will allow rust to start and run under the paint. I thought, That doesn't seem right.

So I've just cleaned up a lift for my barn and scraped away a lot of flaking powdercoat, and you know what? Rust running underneath.

Gary's additional advice was, Prime it, then Rustoleum. A Mark IX tube frame he just painted that way looks marvelous.
baileyman
Third Gear
Third Gear
 
Posts: 344
Joined: 17 Aug 2017
Location: Boston

PostPost by: jono » Thu Dec 01, 2022 4:38 pm

I had mine blasted with chilled iron grit then finished with zinc rich primer to structural steel specification, then 2 pack.
jono
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1989
Joined: 17 May 2007
Location: The wet bit in the top corner of England

PostPost by: Ianashdown » Thu Dec 01, 2022 5:33 pm

pharriso wrote:Just to give you another option... Do a search here for POR-15...

Use gloves!! you have been warned :roll:


Hi,

I’m aware of POR-15 and think it’s an excellent product, just limited on color choices.

Ian
Ianashdown
Second Gear
Second Gear
 
Posts: 166
Joined: 14 Oct 2022
Location: Orange County, USA

PostPost by: Ianashdown » Thu Dec 01, 2022 8:23 pm

Just as an FYI, this is the appearance I’m aiming for.
C90ACF22-683B-4007-B3B1-5DF7335C9485.jpeg and

3E72D130-1E9D-4315-9FA1-BF4389A83E27.jpeg and

958039E1-D52E-485D-98E2-6E873EBE4322.jpeg and


Ian
SoCal
Ianashdown
Second Gear
Second Gear
 
Posts: 166
Joined: 14 Oct 2022
Location: Orange County, USA

PostPost by: mbell » Thu Dec 01, 2022 8:56 pm

I guessing the factory hadn't started over coating the red oxide with black paint by the time of your car (S2?)?

If they had a black chassis opens up the options even further.
'73 +2 130/5 RHD, now on the road and very slowly rolling though a "restoration"
mbell
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2476
Joined: 07 Jun 2013
Location: Austin, TX (UK Ex-pat)

PostPost by: 2cams70 » Thu Dec 01, 2022 9:00 pm

Paint is better than powder coat.
I’ve had good success with Eastwood paints in the past. I have tried Por-15 also but wasn’t very successful in the application I used it for and is difficult to apply. Eastwood on the other hand was a traditional style paint but a very good traditional style paint.
1970 Ford Escort Twin Cam
1972 Ford Escort GT1600 Twin Cam
1980 Ford Escort 2.0 Ghia
Peugeot 505 GTI Wagons (5spdx1) (Autox1)
2022 Ford Fiesta ST.
2cams70
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1714
Joined: 10 Jun 2015
Location: Australia

PostPost by: Ianashdown » Thu Dec 01, 2022 9:05 pm

I appreciate the feedback. That seems to be the way to go. Did you use a zinc primer before the Eastman paint.

Ian
Ianashdown
Second Gear
Second Gear
 
Posts: 166
Joined: 14 Oct 2022
Location: Orange County, USA
Next

Total Online:

Users browsing this forum: No registered users and 25 guests