I would paint them as soon as possible.

I was told by my shotblaster to prime the parts immediately.

Chris Gunn

Vapour blasting removes all traces of surface residue leaving bare metal exposed to the elements. Surfaces will oxidise quickly dependant on what they are exposed to, even some peoples finger oils can adversely affect metals. Applying anti oxidant oils is recommended for long term, 12 month max, storage. I would refinish as soon as possible otherwise you may have wasted time and money having it done before your ready to finish.

I have noticed that panels left with only a primer coat on cars do start rusting after some weather exposure so being porous would tally with that observation

Mike

Can you put the steel parts in the airing cupboard indoors?

When I was a kid I kept the newly rebored and cleaned V6 engine block from my Zodiac in my bedroom, until I had saved up enough to reassemble and reinstall the engine !

Edited By John Doe 2 on 06/12/2022 10:36:04

too late now should have painted it before you took it home will need doing again

one of my friends was a commercial shotblaster and I used to get my old stationary engine parts ,ie some steel (fuel tanks) and a lot of cast iron,blasted, when blasted I took the parts home and and painted immediately with a thinned down coat of red oxide and when dry a thicker normal coat,the friends work was mainly for commercial vehicles ie water pumps,steering boxes and these ere just sprayed matt black as corrosion protection was not really required as English lorries threw out enough oil to stop rusting. The thin coat ensured that any pits were coated and the thick coat gave corrosion protection. With bright loco parts why not store them in the airing cupboard and paint them indoors, utility room is ideal as the floor covering is tiles so there is very little dust,I once got the engine bed of a 7 Hp cCossley into our hallway,it sat on a sheet of hardboard over the carpet but this is not ideal as dust from the carpet rises as you move around painting and ruins the paint finish, I also keep the the high tension magnetos in the airing cupboard,one spare has been there over 40 years,I have tolerant wife as she also buys her own engines though i get the job of restoring them.

I sprayed a motorcycle petrol tank black in my mums kitchen. It was not a good idea, my makeshift booth did little to contain the black dust cloud that covered every surface, even the sugar bowl had a layer on the sugar.

Mike

Why is it late in the year to paint something? I've just been in my unheated garage to check the Union T&C Grinder cabinet I sprayed Sunday afternoon and it's as expected, just fine, I'm genuinely confused why you shouldn't paint at this time of the year?

My experience was to see an item, start to show a thin film of rust in a matter of minutes after being sandblasted.

The more humid the atmosphere, the sooner the rust starts to form.

Like many of the others, ,IMMEDIATELY, is my advice, FWIW

Howard