CHASSIS PAINTING

[FURRY]

Hello everyone,

                       have started to strip down the pre lit i have just brought, I am fast approaching a bare chassis. the problem is that as the car is 19 years old and never seen the road (except from when i saved it from the previous owner and pushed it onto the trailer)

the chassis is looking a bit tired, but solid with only minimal surface rust and i was thinking of painting it with por 15 rust preventer, as being a poor student can't afford blasting and powdercoating. can i use por 15 over the old powdercoat or do i have to strip it all off. many thanks Furry

[peterg]

AFAIK you can just paint it on over the powdercoat  but it works best if you clear the surface of any visible rust first otherwise it 'could' carry on corroding underneath the PO15 coat - it's unlikely but as you've stripped the chassis down it's the one good chance to do it right  

[KerryS]

If it was me doing it, I'd remove powder coating far enough back from the rust to see bare steel and then work from there. Otherwise, as peterg says, corrosion will creep.

Kerry

[chazpowerslide]

Blasting and powder coating is not as expensive as you may think.

I got Mark Jackson's chassis blasted and coated for (IRRC) £100.

Most blasters and powder coaters will do a deal for cash, make some calls an shop around.

Chaz.

[Blatman]

I agree with Chaz. IMHO, trying to save money on chassis prep is a false economy.

Besides, if you were a poor student, you wouldn't have bought a Westfield that needed a complete strip and rebuild

[adamnreeves]

AFAIK you can just paint it on over the powdercoat  but it works best if you clear the surface of any visible rust first otherwise it 'could' carry on corroding underneath the PO15 coat - it's unlikely but as you've stripped the chassis down it's the one good chance to do it right  

I would personally remove all the powder coat but I am obessive! Anyway I was wondering why people say that rust carries on corroding underneath, isn't rust the chemical reaction called oxidisation which requires the presence of oxygen, or does POR 15 not completely seal the metal?

[Bean]

You should be able to clean the affected area back to good powdercoat, strip all around the rusty area then treat and hammerite.

I need to do the chassis rail infront of the driver side, been meaning to since I bought the car.

[Blatman]

Use POR15 before the Hammerite

[michaelcoombs]

if you were a poor student, you wouldn't have bought a Westfield that needed a complete strip and rebuild

Pah!    I bought mine with my student loan and had to survive on just on beer for the next 3 years... even sold my TV and Video to pay for my Zetec.... I still don’t have a TV 5 years later    its all a mater of priorities    

[Bazzer]

What have you chaps who have re powder coated done about the holes in the chassis.

Does it not fill up with the shot from blasting ?

I am looking to re powder coat this winter, so am quite interested.

Bazzer

[perksy]

Have used Por 15 and it's very good  

PM if you need any advice on using it, it can be very dangerous    

Needs to go on bare metal though, preferably after using POR 25 Metal ready

All depends how bad the current chassis is  

If you want to do it properly, get it blasted and then

re-powdercoated

Be wary if they suggest Chemical stripping the chassis, it's better to get it blasted as it provides a better 'key' for the powdercoat to bond to

(used to work at a company with powdercoating facilities)

HTH

[FURRY]

thanks alot everyone. i think i will have a quick saerch around for cheap powder coating in and around bournemouth/ poole area. if i can't find a good quote will have to stick with por or hammerite although i have heard hammerite peels off of powdercoat, can anyone advise. also what is better, hammerite or por15. Furry

[perksy]

Por 15    

Hammerite has a tendency to chip, Por 15 Doesn't

Be aware though that it's UV sensitive so if it's going to be 'visible' it will require top-coating with Hammerite or similar

HTH

[stu999]

Hammerite = ****e (IMHO). Get a tin or two of 'Plastikote' aerosol from B&Q, or better still, some 'Hard Hat' (wont get this at B&Q though). Sadly quite difficult to source but amazing stuff, and looks like powdercoat when dry too

POR15 underneath first though

[Robandcolin]

Ferndown powder coat Did my wishbones. And I think they have done a few other peoples stuff too check they have a big enough oven though.

They did all four wishbones and rear trailing arms for £20 shot blasted and coated.

PM me I can come and have a look tonight and advise you if you like.

Rob