Paint prep

This topic has 7 replies, 7 voices, and was last updated 2 March 2020 at 19:02 by Dave Halford.

Viewing 8 posts - 1 through 8 (of 8 total)

Author

Posts
29 February 2020 at 15:48 #454757
Alan Wilkinson 1
Participant
@alanwilkinson1
Hi a query for you paint experts, I have made a traction engine steam chest from bar cast iron ,the covers are bronze, studs and nuts steel. what prep is needed for painting I Have high heat paint stove paint but it says nothing about priming or what ever The chest covers etc are bronze what do I need for them or would you just black the block and polish up the bronze ATB Alan
Advert

29 February 2020 at 15:48 #10095
Alan Wilkinson 1
Participant
@alanwilkinson1
CI steam chest
1 March 2020 at 00:02 #454804
Steviegtr
Participant
@steviegtr
If you are talking about stove enamel then. My Dad had an electrical shop & used to recondition the old Hoover vacs. The body was alloy. All he did was use a Alloy etch which was a yucky looking yellow stuff. Then paint straight on with no primer as such. I myself have been painting for many years but on cars & motorcycles. Not sure about painting onto cast. If you are using high heat paint then I cannot see any point in using a primer, as long as the parts are super clean. There must be someone along shortly to give you a definitive answer to this.

Steve.
1 March 2020 at 05:49 #454812
Graham Stoppani
Participant
@grahamstoppani46499
Dan Gelbart has some interesting things to say about surface prep. for painting on YouTube

Den Gelbart: Building Prototypes part 6 of 18
1 March 2020 at 17:33 #454899
duncan webster 1
Participant
@duncanwebster1
Posted by Steviegtr on 01/03/2020 00:02:27:

If you are talking about stove enamel then. My Dad had an electrical shop & used to recondition the old Hoover vacs. The body was alloy. All he did was use a Alloy etch which was a yucky looking yellow stuff. Then paint straight on with no primer as such. I myself have been painting for many years but on cars & motorcycles. Not sure about painting onto cast. If you are using high heat paint then I cannot see any point in using a primer, as long as the parts are super clean. There must be someone along shortly to give you a definitive answer to this.

Steve.

Possibly zinc chromate primer, used to prime aluminium aeroplanes back in the olden times. I tried it on an aluminium garage door, didn't work all that well
2 March 2020 at 08:58 #454976
Perko7
Participant
@perko7
More years ago than I care to remember I overhauled a side-valve Ford Prefect engine. Painted the whole block and head (both cast iron) with 'Engine Enamel' which was a supposedly temperature-resistant paint. Went on neat, no primer or undercoat required. I had already cleaned the block using kerosene and a stiff brush followed by soapy water. Paint was still in good condition when I foolishly sold the car 20 years later. Perhaps the vintage car and motorcyle owners in this forum could suggest a modern alternative?
2 March 2020 at 15:13 #455040
John Rutzen
Participant
@johnrutzen76569
Great video Graham you posted a link to. I learnt more about why my paint doesn't stick from that than from anywhere else!
2 March 2020 at 19:02 #455063
Dave Halford
Participant
@davehalford22513
You can get zinc spray primer that's good for 300C
Author

Posts