Metal prep prior to painting

[smo]

On the D-Lander ive done a LOT of fabrication, now ive not painted as ive gone along as many places are revisted on later parts of the build, howeve a lot of the tube and frame now has light surface rust, what should i do to prepare this before painting??

Can something like POR-15 be used directly onto surface rust then overpaint with my chassis/coach paint ??

Ideas and suggestions please gents

[white90]

POR15 is crud avoid at all costs

if you want I can post you some that is still peeling off in sheets from my chassis.

totally rusty surfaces apparently fair better with it.

[smo]

oh, any ideas what else i can use as i cant really clean it all back to fresh shiney metal as i dont have a year to spare doing it!!

[SteveG]

I've used Kurust on things like side sills and bumoers and it's always worked well. You have to use as guided and paint over once dry with primer and top coats as it's preparation only not protector.

Cheers

Steve

[white90]

I use zinc rich primer and halfords matt black enamel straight onto everything.

[smo]

I use zinc rich primer and halfords matt black enamel straight onto everything.

Even lightly rusted steel?

[white90]

yes straight on top

when the chassis gets dragged over rocks/stumps etc the paint is removed

I generally wash it down soon ( a day or so later) after the event

then let it dry out for a week before painting the primer on it

a day or so later I put the top coat on.

there is no rust scabs on the chassis anywhere. it has faired well since I got the 90 in 2001.

I did the clean down/POR15 treatment it was a total waste of time it just peels off.

the zinc rich primer is only £9 a litre the enamel £5 for a 1/4 litre

I use a fair bit a year but it seems to do the job well

[ripley]

On the D-Lander ive done a LOT of fabrication, now ive not painted as ive gone along as many places are revisted on later parts of the build, howeve a lot of the tube and frame now has light surface rust, what should i do to prepare this before painting??

Can something like POR-15 be used directly onto surface rust then overpaint with my chassis/coach paint ??

Ideas and suggestions please gents

Bonda metal primer, give me a shout i'll sort you some

[Astro_Al]

Acid etch primer.

Make sure you use panel wipe or similar on the steel before you paint it to get all the oily crud off it.

Al.

[doddel]

yes straight on top

when the chassis gets dragged over rocks/stumps etc the paint is removed

I generally wash it down soon ( a day or so later) after the event

then let it dry out for a week before painting the primer on it

a day or so later I put the top coat on.

there is no rust scabs on the chassis anywhere. it has faired well since I got the 90 in 2001.

I did the clean down/POR15 treatment it was a total waste of time it just peels off.

the zinc rich primer is only £9 a litre the enamel £5 for a 1/4 litre

I use a fair bit a year but it seems to do the job well

where do you get zinc rich primer for only £9 a litre (and what brand)?

[hairyone]

What's the view on red/grey oxide vs. zinc rich primer.

My chassis has been sprayed with waxoil each year but most of the underlying paint has gone. I was planning to clean it back to bare but lightly rusted metal kurust and then paint again.

The trouble I have is choosing a primer... I can see that a zinc rich primer has some electrolytic anti-rust formation propertions but what about red-oxide and grey oxide paint and for that matter micaceous iron oxide (MIO) paint how do they work.

Apparent;y you can still buy red-lead (wasn't this the pre-cursor to which red oxide is a pale imitation?)

Red Lead

Micaceous iron oxide

Red/Grey Oxide

[Mark90]

I have had good results with a MIO primer from Dacrylate.

[smo]

MMMMM red lead...interesting idea!