Looking at the respective SDSs, it turns out that contaclean and protection look very much the same; actually it's spraywash who has more components.
I really wonder if it's worth applying anything more than contaclean. That would be just applying deoxit d5.
Contaclean:
1-Hydrocarbons, C6, isoalkanes, <5% n-hexane 40-60 %
2-propan-2-ol; isopropyl alcohol; isopropanol 20-40 %
3-Carbondioxide <5%
Protection:
1-Hydrocarbons, C6, isoalkanes, <5% n-hexane 30-60%
2-propan-2-ol; isopropyl alcohol; isopropanol 25-50%
3-Carbondioxide 2,5-10%
Spraywash:
1-Hydrocarbons, C6, isoalkanes, <5% n-hexane <0,1% Benzol 25-50%
2-propan-2-ol; alcohol isopropílico; isopropanol 25-50 %
3-Hyrdrocarbons, C9-C11, n-alkane, isoalkane, cyclic, <2% aromatic 10-25%
4-1-Methoxy-2-propanol 10-25 %
5-Carbondioxide 2,5-10 %
6-butanona; etil-metil-cetona 2,5-10 %