safety caps for sharp end of nails or screws

Whereabout exactly? Give them a smack with a hammer

 

Hang your coat on them.
Or replace them with the proper size.

 

Buy a nail punch.

http://www.screwfix.com/p/5-piece-nail-punch-set-1-16-to-3-16/14184#_=p

 

http://www.screwfix.com/p/dewalt-nail-punch-set-3-pieces/7067c

Best ones I've ever owned. They get used a lot more now with the nailer, as it doesn't bury the heads every time.
Rubber handle makes them much more comfortable to use.

 

Grind them off?

 

Bit of an aggressive approach...

I would have suggested metal blade on a multi-tool.

 

Blob of silicone?

 

I agree with some above. Take them out and use proper length, or grind them off (possible to nip screws close, and whack with hammer to snap off - or work up and down for nails).

Mr. HandyAndy - Really

 

Tell us something we don't know!

They only work at B&Q because they were to bright to work at Screwfix, mind you Screwfix staff do walk on two legs.

 

Angle grinder.

 

B&Q staff walk on two legs! Those other two on the floor are their arms.

Mr. HandyAndy - Really

 

If the job had been done properly with the correct screws and nails there would not be a problem.
How would you market the bodgers bead?

 

Reckon you have found the perfect name "Bodgers Bead" Deleted member 11267 see you on Dragons Den!

 

Where exactly are these sharp nail and screw tips and why such a problem

Depending on surrounding surface and access, 4" grinder with thin metal slitting disc would be fast approach

 

Hacksaw them flush!

 

Stick some unfinished slices of pizza on the points. Decorative too!

Mr. HandyAndy - Really

 

Gavin
Remove screw, grind/cut last 5mm off & replace said screw.

Easy.

Mr Handyandy, silly suggestion. Waste of a good Pizza.