Ped
Member
- Messages
- 257
Sorry, this is a bit late now you've bought all the blasting gear but...
I've had good success removing scale with hydrochloric acid. I've mainly dipped small parts but you can paint in on with a brush. The scale melts off leaving a surface that looks like it's been blasted (pic below). Once the scale is removed the surface will go rusty really quickly but rinsing with bicarb of soda helps prevent that. You sculpture would take a 5 litres (£20) and a couple of hours to do.
https://www.ebay.co.uk/p/Hydrochlor...e-for-European-6l/1542463395?iid=162753627333
The acid is nasty stuff so do it outside and wear good PPE. Have a hose ready etc. The 18% concentration works well, you can dilute the stronger stuff (cheaper postage off ebay) but be careful, the 35% concentration fumes badly and is proper horrible. Keep it away from your tools etc. You'll also need a brush the acid won't melt. An old toothbrush works but you might need something bigger!
I've had good success removing scale with hydrochloric acid. I've mainly dipped small parts but you can paint in on with a brush. The scale melts off leaving a surface that looks like it's been blasted (pic below). Once the scale is removed the surface will go rusty really quickly but rinsing with bicarb of soda helps prevent that. You sculpture would take a 5 litres (£20) and a couple of hours to do.
https://www.ebay.co.uk/p/Hydrochlor...e-for-European-6l/1542463395?iid=162753627333
The acid is nasty stuff so do it outside and wear good PPE. Have a hose ready etc. The 18% concentration works well, you can dilute the stronger stuff (cheaper postage off ebay) but be careful, the 35% concentration fumes badly and is proper horrible. Keep it away from your tools etc. You'll also need a brush the acid won't melt. An old toothbrush works but you might need something bigger!