Red oxide / grey primer question

[chodjinn]

Need a bit of advice. Late last year I finished restoring my shell, sprayed it with red oxide as I went along. Seam sealed the underneath and then gave it a decent coat of stonechip (nothing too mad as it's not a road car, track only).

Seam sealed the rest of the car - interior and engine bay. I then sprayed grey primer on the engine bay and boot, and a few other bits.

What with the moist weather we've had and an accident I've not been able to continue working on it for a few months, and now the grey primed areas have started to exhibit extremely small spots of rust. I am a bit mortified, as I thought the red oxide was non porous (although I know the grey primer is, so I assume moisture has got in and then under the red oxide?).

I realize I'm going to have to strip these areas back to bare metal and respray.


Was looking for a bit of advice on the best way of doing this. I'm doing it myself and don't have a compressor anymore. I'm not looking for a show car finish just something that will do - functional. My original plan was red oxide > grey primer > matt black > laquer, all using rattle cans.

Any of you retro riders provide me with some superior knowledge?! Already not looking forward to stripping it down again ... the red oxide only areas all seem fine though?

[Kieran]

Red oxide isn't like the red lead of old, it's just red primer.

[chodjinn]

Feb 8, 2016 13:24:25 GMT Kieran said:

Red oxide isn't like the red lead of old, it's just red primer.

So it appears, but the areas that have just had red oxide look fine. It's the areas that I have gone over with grey primer that have the issue?

[chrissyb]

maybe the red just 'hides' it?

I used to use some grey primer that had zinc in it. Maybe that's a bit better?

[taurus]

Bonda Primer seems to work better - I am told it has a higher zinc content than other paints. Goes on well so it's nice to use.

[kevralpina]

Grey primer is porous hence the rust comoing through red oxide is not so either strip back the grey and prime with red or if you do prime with grey spray a top coat on asap I,e wet on wet hope this helps kev

[chodjinn]

Looks like I will have to strip back the areas that I sprayed grey and give another coat of red oxide then.. Going to plan this a bit better and try and get it all done in a few days in the next fortnight. The other week I sanded back the roof as it had got oil on it somehow and the red oxide seemed to have faired pretty well on it's own.

[8bitash]

Epoxy is the only non porous Primer and virtually anything will go on over top of it. Buy a cheap electric gun or £50 compressor it will still work out better value than using a load of cans and you will get a better finish. You can always sell them at the end.

[chodjinn]

Feb 9, 2016 11:39:22 GMT 8bitash said:

Epoxy is the only non porous Primer and virtually anything will go on over top of it. Buy a cheap electric gun or £50 compressor it will still work out better value than using a load of cans and you will get a better finish. You can always sell them at the end.

Any suggestions for gear that I could use would be very useful, and paint as well.

I did have a massive compressor but sold it last year as I wasn't using it, doh!



Electric paint guns like this?
www.ebay.co.uk/itm/HVLP2000-SEALEY-AIR-ELECTRIC-HVLP-PAINT-REPAIR-SPRAY-GUN-KIT-600W-230V-/251690090981?hash=item3a99e601e5:g:VVIAAOSwEppUSjfq

Or what about a cheap compressor? I'd be doing it in my garage.

[8bitash]

I've never used one of those electric guns other than to paint a fence but thats the type I was thinking of and have read about people having pretty decent results from them. I've painted a full side of a caddy van with a cheap suction fed gun and a lidls/aldi 25l compressor. As long as you don't expect miracles you can get a pleasing finish. Definitely better than from a spray can.
A 2k Epoxy like Lechlar is good value and will do the job very well.

[chodjinn]

Yeah I have heard those lidle/aldi compressors are ok. I would rather use one of those than an electric gun, doesn't sound like they give even enough coverage - ok for a fence but not a car! Any other options for cheap but cheerful compressors? How about machine mart

It's a track car so I'm not massively fussed about it being perfect. Just want something that can do it ok. Where's a good place to buy the lechlar stuff from? Found a couple of places on ebay. I assume the lechlar primer is ok as well?

Just need to find a decent colour to put on top now, was going for black most likely!