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I always use this etch primer and their complete range of paints, I've never had any problems with it unlike some I've used from Super..... !!
MOTOSPRAY Super Etch Primer Grey Pressure Pack 400g (Hichem... - Compare Prices and Deals, Shop & Buy Online in Australia at MyShopping.com.au
I'm using one coat of etch primer on bare metal, then after a couple of hours (sometimes the next day) a very light sand to take off any high spots then 2 coats of epoxy enamel. I let the first coat touch dry and then apply the second, slightly heavier coat.Quote:
Originally Posted by uninformed
I usually degrease with mineral turpentine or metho (ethanol). I don't degrease between etch & epoxy, I just keep my fingers off the surface when sanding.
Some parts like leaf springs I treat with phosphoric acid (etches & holds back any rust) then brush paint with epoxy enamel, usually 2 coats to ensure complete coverage.
Post #146 shows a shock absorber painted in a day then left for a couple of days before installing. http://www.aulro.com/afvb/other-powe...es-3-a-15.html
Thinning & degreasing can be done using the same product but.....some paints can be removed using thinners once they are dry. They dry by the solvent evaporating, apply more solvent and the paint becomes liquid again. I used a lot of cellulose paint back in the UK, this can be removed years down the track with cellulose thinners.
For oil based paints in the UK you could get 'White Spirit' or 'Pure Gum Turpentine'. White spirit was cheaper and it was used for thinning paints and degreasing. When I came to Australia all I could find was 'Pure Gum Turpentine' or 'Mineral Turpentine', I'm not sure whether mineral turpentine & white spirit are the same.
What about 'Prep Wash' for cleaning prior to painting.
Just checked a Dulux MSDS and it's white spirit, petroleum & toluene.
Colin
this is what i use
http://www.aulro.com/afvb/attachment...1&d=1361915917
http://www.aulro.com/afvb/attachment...1&d=1361915942
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tell em dave the computer guy sent you ;)
I dont know much, but I do know acetone and w&g remover are very different. Pretty sure Acetone is not a hydrocarbon.
According to a Glasurit paint tech I spoke to top coats should not be appiled directly to Etch primer. A standard primer is used to isolate etch primer acid...:wasntme:
I think you will find alot of similarites between white spirits, shellite, W&G remover, prep wash. White spirits is definitley available here, diggers make it.
I dont think acetone the same, but again, the small amount I applied IMMEDIATLY removed paint. So did the W&G remover.....
I just did a test patch of W&G on the re try of etch/prime on the shocks. All good and no sign of it coming off.
One thing I try and do, and it can be hard, is to buy the same brand if using more than one part, ie primer and top coat. Hopefuly they will be compatable that way. (read back of tin/can)
I think there are alot of generlisations and wives tails when it comes to paint/painting. As much as we think they are all pretty much the same, either acrylic or enamel, there can be subtial differences in chemical that can make or break the quality of the job.
Just looked at my spray cans and acetone is 10-30% the propelant in the engine enamal, while Metho 10-20% in the etch primer.........
confusing much hahaha.
I've been using Wattyl Killrust products (and also White Knight) and decided I'd read the instructions....I know, absolute last resort is to read the instructions.
"Degrease using Mineral Turps."
"Wipe off overspray using Metho (Ethanol)"
"Spray topcoat within 48 hours to avoid surface contamination."
The etch primer is really for the more difficult metals to get paint to stick to like aluminium, brass, copper, st/st, zinc & lead. The HD primer is the same cost as the etch so no reason not to use etch primer on steel.
"Apply topcoat directly over the etch primer."
I guess there are etch primers & etch primers. Not sure why you would need a primer over an etch primer, would increase sales though. No seriously, you might need to isolate one paint type from another, it wouldn't be just to boost sales.....
Colin