Hi and thanks for the replies Aussietrev and damo.
Petrol TankI'll hold off on the petrol tank. I had considered the motorcycle tank repair stuff, might do it later for the learning experience.
Rust ConverterA couple of further questions:
- Does zinc gal paint form a bondable layer for topcoats (i.e. like a normal primer)?
- Would a chrome-finish paint benefit from a white or grey primer/undercoat?
Otherwise I've been playing with the rust converter (Ranex rustbuster- a phosphoric acid solution) and found the following (ain't experience something?
)
- The item I'm using it on has at least three different metal types which were hard to tell apart, although I think I understand now the thinking behind their usage.
- The rust converter works well with the chromed metal rust spots
- Aluminium doesn't like the rust converter- I should have known this
- The galvanised/plated (I think) metal really doesn't like the rust converter- which identified it to me as galvanised/plated
More info...Unfortunately this phosphoric acid recommends against being near zinc-gal type paint (which I had bought a can of) no doubt for the reasons outlined above. But maybe once wiped down post-application it will be OK, will give it a try.
Some of the rust spots are/were in allen key/bolt heads so will no be able to be sanded before some coating- this is where I think I'll use the zinc gal paint.
I did find some info online about painting over chrome- basically sand back to the nickel underneath, followed by priming, resanding, top coating then clear.
The rest of the item I was going to sand and use a metal etch primer (then maybe normal primer) followed by top coat (or two) and (perhaps) clear (or two).
The topcoat is to be a chrome-finish-type paint. But if the fit takes me, I think it'd look great in hammertone blue...you might wish to 'egg me on'!
And the item? Well that will have to remain undisclosed for the moment. It's a cheap test/learning experience before I learn by damaging something I shouldn't!
Thanks again,
