Valve Caps

[Coby.]

This is a stupid Question BUT I need help

I bought some Metal Valve Caps a while ago and now I just went to Pump my Tyres up but I couldn't get them off, I've put plenty of WD40 on them and they are still not budging,

Any ideas?

Thanks

 

[Rudi]

grease/more wd40 + a set of plyers