- Clean fasteners.
- Clean shafts.
- Clean assemblies.
- Don't buy less than 1500W.
- Always wear "eye-protection"/]
- Always use "welding-gloves"/]
Use these to soften paint or anti-corrosion coatings which are fouling the the head you’ll be attacking. While these don’t have the poke of full on “induction-heaters”/] they may also cause significant expansion and contraction of the fastener and/or shaft and help disrupt the corrosion.