Gravestone lettering?

[Calverley Lad]

Nearby  to me there is a large monument with a distant connection to my family name containing the remains of eleven departed souls.
The last remaing member of the family (living 200miles away) has organised for the memorial to be cleaned and the lettering made clear. (currently the lettering doesn't have any embossing on) which makes it hard to read unless close up.
To give you some idea the monument is 20+feet high and is surrounded by 1foot square blocks to each side each @20 feet long times 2.
The idea is to paint the lettering with a black coloured paint?
[The stumbling block is the contactor wants £1,000 to carry out this task]
The monument is constucted from pinkish colored marble, the hight of lettering is within my reach if I attempt the job, couple of dry days permitting.
Question though is what type of paint would I use: enamel/cellulose or other?

[Milliepede]

First thought is do you need to get permission to do that?  Maybe you already have that.

[Calverley Lad]

Yes permission had been given, the once cleaned memorial is to be featured on local TV.
Just can't remember what paint my late father used 70 years ago?
[My late father was a monumental stone mason, me being his gopher as and when he needed help on weekend local jobs]
 Brian